diff --git a/src/animals.rs b/src/animals.rs
index 76f7608..6e9f04c 100644
--- a/src/animals.rs
+++ b/src/animals.rs
@@ -2,9 +2,7 @@ use bevy::prelude::*;
 
 pub struct Plugin;
 impl bevy::prelude::Plugin for Plugin {
-    fn build(&self, app: &mut App) {
-
-    }
+    fn build(&self, app: &mut App) {}
 }
 
 #[derive(PartialEq, Eq, Clone, Copy)]
@@ -14,5 +12,5 @@ pub enum AnimalKind {
 
 #[derive(Component)]
 pub struct Animal {
-    kind: AnimalKind
+    kind: AnimalKind,
 }
diff --git a/src/camera.rs b/src/camera.rs
index fae1f10..58c12ce 100644
--- a/src/camera.rs
+++ b/src/camera.rs
@@ -1,6 +1,13 @@
 use std::time::Duration;
 
-use bevy::{input::mouse::MouseWheel, math::NormedVectorSpace, picking::{focus::HoverMap, pointer::PointerId}, prelude::*, utils::HashMap, window::PrimaryWindow};
+use bevy::{
+    input::mouse::MouseWheel,
+    math::NormedVectorSpace,
+    picking::{focus::HoverMap, pointer::PointerId},
+    prelude::*,
+    utils::HashMap,
+    window::PrimaryWindow,
+};
 
 use crate::ui;
 
@@ -8,17 +15,14 @@ pub struct Plugin;
 impl bevy::prelude::Plugin for Plugin {
     fn build(&self, app: &mut App) {
         app.add_systems(Startup, setup);
-            // .add_systems(Update, move_cam)
-            // .init_resource::<Pointers>();
+        // .add_systems(Update, move_cam)
+        // .init_resource::<Pointers>();
     }
 }
 
 fn setup(mut cmds: Commands, window: Query<&Window>) {
-    let zoom = 2./window.single().width().min(window.single().height());
-    cmds.spawn((
-        Camera2d,
-        Transform::from_scale(Vec3::new(zoom, zoom, zoom))
-    ));
+    let zoom = 2. / window.single().width().min(window.single().height());
+    cmds.spawn((Camera2d, Transform::from_scale(Vec3::new(zoom, zoom, zoom))));
 }
 
 #[derive(Resource, Default)]
@@ -33,50 +37,80 @@ fn move_cam(
     window: Query<&Window, With<PrimaryWindow>>,
     mut pointers: ResMut<Pointers>,
     hover_map: Res<HoverMap>,
-    time: Res<Time>
+    time: Res<Time>,
 ) {
     let window = window.single();
     let mut cam = cam.single_mut();
     let map_ui_entity = map_ui_entity.single();
-    let ps = hover_map.iter().filter_map(|(id, hit_map)| match id {
-            PointerId::Mouse => window.cursor_position().map(|p| 
-                match pointers.0.get(id) {
-                    Some(p_cache) => (p_cache.1.filter(|_| mouse_buttons.pressed(MouseButton::Left)), p, p_cache.0),
-                    None => (None, p, p)
-                }
-            ),
-            PointerId::Touch(i) => touches.get_pressed(*i).map(|t| (pointers.0.get(id).map(|(pos, start)| (*start).unwrap_or(time.elapsed())), t.position(), t.previous_position())),
-            _ => None
-        }.map(|(pressed_start,new_pos, old_pos)| (pressed_start,new_pos,old_pos,id,hit_map))
-    ).collect::<Vec<_>>();
-    let pressed_on_map = ps.iter().filter(|p| p.0.is_some() && p.4.contains_key(&map_ui_entity)).collect::<Vec<_>>();
-    
-    let old_midpoint = pressed_on_map.iter().fold(Vec2::ZERO, |acc, (_, _, old_pos, _, _)| {
-        acc + (old_pos/pressed_on_map.len() as f32)
-    });
-    let new_midpoint = pressed_on_map.iter().fold(Vec2::ZERO, |acc, (_, new_pos, _, _, _)| {
-        acc + (new_pos/pressed_on_map.len() as f32)
-    });
+    let ps = hover_map
+        .iter()
+        .filter_map(|(id, hit_map)| {
+            match id {
+                PointerId::Mouse => window.cursor_position().map(|p| match pointers.0.get(id) {
+                    Some(p_cache) => (
+                        p_cache
+                            .1
+                            .filter(|_| mouse_buttons.pressed(MouseButton::Left)),
+                        p,
+                        p_cache.0,
+                    ),
+                    None => (None, p, p),
+                }),
+                PointerId::Touch(i) => touches.get_pressed(*i).map(|t| {
+                    (
+                        pointers
+                            .0
+                            .get(id)
+                            .map(|(pos, start)| (*start).unwrap_or(time.elapsed())),
+                        t.position(),
+                        t.previous_position(),
+                    )
+                }),
+                _ => None,
+            }
+            .map(|(pressed_start, new_pos, old_pos)| (pressed_start, new_pos, old_pos, id, hit_map))
+        })
+        .collect::<Vec<_>>();
+    let pressed_on_map = ps
+        .iter()
+        .filter(|p| p.0.is_some() && p.4.contains_key(&map_ui_entity))
+        .collect::<Vec<_>>();
+
+    let old_midpoint = pressed_on_map
+        .iter()
+        .fold(Vec2::ZERO, |acc, (_, _, old_pos, _, _)| {
+            acc + (old_pos / pressed_on_map.len() as f32)
+        });
+    let new_midpoint = pressed_on_map
+        .iter()
+        .fold(Vec2::ZERO, |acc, (_, new_pos, _, _, _)| {
+            acc + (new_pos / pressed_on_map.len() as f32)
+        });
 
     // move camera
-    cam.translation.x -= (new_midpoint.x - old_midpoint.x)*cam.scale.x;
-    cam.translation.y += (new_midpoint.y - old_midpoint.y)*cam.scale.y;
-    
+    cam.translation.x -= (new_midpoint.x - old_midpoint.x) * cam.scale.x;
+    cam.translation.y += (new_midpoint.y - old_midpoint.y) * cam.scale.y;
+
     // multiple fingers zoom
     if pressed_on_map.len() > 1 {
-        let old_d_to_midpoint = pressed_on_map.iter().fold(0., |acc, (_, _, old_pos, _, _)| {
-            acc + (old_midpoint-old_pos).norm()
-        });
-        let new_d_to_midpoint = pressed_on_map.iter().fold(0., |acc, (_, new_pos, _, _, _)| {
-            acc + (new_midpoint-new_pos).norm()
-        });
-        let zoom = new_d_to_midpoint/old_d_to_midpoint;
+        let old_d_to_midpoint = pressed_on_map
+            .iter()
+            .fold(0., |acc, (_, _, old_pos, _, _)| {
+                acc + (old_midpoint - old_pos).norm()
+            });
+        let new_d_to_midpoint = pressed_on_map
+            .iter()
+            .fold(0., |acc, (_, new_pos, _, _, _)| {
+                acc + (new_midpoint - new_pos).norm()
+            });
+        let zoom = new_d_to_midpoint / old_d_to_midpoint;
         cam.scale /= zoom;
     }
 
     // mouse scroll zoom
     for ev in ev_scroll.read() {
-        let scale = (cam.scale.x-(ev.y*0.1/window.width().min(window.height()))).clamp(0.0001, 2./window.width().min(window.height()));
+        let scale = (cam.scale.x - (ev.y * 0.1 / window.width().min(window.height())))
+            .clamp(0.0001, 2. / window.width().min(window.height()));
         cam.scale = Vec3::new(scale, scale, scale);
     }
 
@@ -84,9 +118,13 @@ fn move_cam(
     pointers.0.clear();
     for (pressed_start, new_pos, _, id, _) in ps {
         match id {
-            PointerId::Mouse => {pointers.0.insert(*id, (new_pos, pressed_start));},
-            PointerId::Touch(_) => {pointers.0.insert(*id, (new_pos, pressed_start));},
+            PointerId::Mouse => {
+                pointers.0.insert(*id, (new_pos, pressed_start));
+            }
+            PointerId::Touch(_) => {
+                pointers.0.insert(*id, (new_pos, pressed_start));
+            }
             _ => {}
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/lib.rs b/src/lib.rs
index 5aead39..0b1de16 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,12 +1,15 @@
 #![feature(duration_constructors)]
-use bevy::{prelude::*, diagnostic::{FrameTimeDiagnosticsPlugin, LogDiagnosticsPlugin}};
+use bevy::{
+    diagnostic::{FrameTimeDiagnosticsPlugin, LogDiagnosticsPlugin},
+    prelude::*,
+};
 use bevy_inspector_egui::quick::WorldInspectorPlugin;
 
-pub mod map;
-pub mod camera;
-pub mod ui;
-pub mod time;
 pub mod animals;
+pub mod camera;
+pub mod map;
+pub mod time;
+pub mod ui;
 
 #[bevy_main]
 pub fn main() {
@@ -23,7 +26,7 @@ pub fn main() {
             LogDiagnosticsPlugin {
                 filter: Some(vec![FrameTimeDiagnosticsPlugin::FPS]),
                 ..Default::default()
-            }
+            },
         ))
         .run();
-}
\ No newline at end of file
+}
diff --git a/src/map.rs b/src/map.rs
index 998cf0b..e5f72bb 100644
--- a/src/map.rs
+++ b/src/map.rs
@@ -1,15 +1,20 @@
 use std::time::Duration;
 
-use bevy::{asset::RenderAssetUsages, picking::PickSet, prelude::*, render::mesh::{Indices, PrimitiveTopology}};
+use bevy::{
+    asset::RenderAssetUsages,
+    picking::PickSet,
+    prelude::*,
+    render::mesh::{Indices, PrimitiveTopology},
+};
 use noise::{Fbm, MultiFractal, NoiseFn, Perlin};
 use rand::{thread_rng, Rng, SeedableRng};
 use voronoice::{BoundingBox, Point, VoronoiBuilder};
 
 mod cells;
 mod picking;
-use picking::*;
-use cells::*;
 pub use cells::CellKind;
+use cells::*;
+use picking::*;
 
 use crate::{time::GameTime, ui::CurrentAction};
 
@@ -35,16 +40,16 @@ pub const SIZE: usize = 10000;
 struct Seed(u32);
 
 #[derive(Component)]
-pub struct Voronoi (voronoice::Voronoi);
+pub struct Voronoi(voronoice::Voronoi);
 
 #[derive(Component)]
 pub struct MapMarker;
 
 #[derive(Component)]
-struct MapColors (Vec<[f32; 4]>);
+struct MapColors(Vec<[f32; 4]>);
 
 #[derive(Component)]
-pub struct CellsEntities (Vec<Entity>);
+pub struct CellsEntities(Vec<Entity>);
 
 #[derive(Component)]
 pub struct MeshNeedsUpdate(bool);
@@ -53,12 +58,15 @@ fn setup(
     mut cmds: Commands,
     mut meshes: ResMut<Assets<Mesh>>,
     mut materials: ResMut<Assets<ColorMaterial>>,
-    seed: Res<Seed>
+    seed: Res<Seed>,
 ) {
     let mut rng = rand::rngs::SmallRng::seed_from_u64(seed.0 as u64);
     let mut sites = Vec::with_capacity(SIZE);
     for _ in 0..SIZE {
-        sites.push(Point { x:rng.gen_range(-WIDTH/2.0..WIDTH/2.0) as f64, y:rng.gen_range(-HEIGHT/2.0..HEIGHT/2.0) as f64 })
+        sites.push(Point {
+            x: rng.gen_range(-WIDTH / 2.0..WIDTH / 2.0) as f64,
+            y: rng.gen_range(-HEIGHT / 2.0..HEIGHT / 2.0) as f64,
+        })
     }
     let voronoi = VoronoiBuilder::default()
         .set_sites(sites)
@@ -68,19 +76,22 @@ fn setup(
         .unwrap();
     let mut cells = Vec::with_capacity(SIZE);
     let z_noise = Fbm::<Perlin>::new(seed.0);
-    let moisture_noise = Fbm::<Perlin>::new(seed.0+1)
-        .set_frequency(2.);
+    let moisture_noise = Fbm::<Perlin>::new(seed.0 + 1).set_frequency(2.);
     for i in 0..SIZE {
         let c = voronoi.cell(i);
         let site = c.site_position();
         let z = (
             0.3 // Arbitrary value
             + ((z_noise.get([site.x, site.y])+1.)/2.) // Noise + [0; 1]
-            - ((site.x.powi(2)+site.y.powi(2)).sqrt()*0.5) // Distance - [0; sqrt(2)] * 0.5
-        ).clamp(0., 1.);
+            - ((site.x.powi(2)+site.y.powi(2)).sqrt()*0.5)
+            // Distance - [0; sqrt(2)] * 0.5
+        )
+        .clamp(0., 1.);
         let m = (
-            (moisture_noise.get([site.x, site.y])+1.)/2. // Noise + [0; 1]
-        ).clamp(0., 1.) as f32;
+            (moisture_noise.get([site.x, site.y]) + 1.) / 2.
+            // Noise + [0; 1]
+        )
+        .clamp(0., 1.) as f32;
         let k = if z <= 0.5 {
             CellKind::Sea
         } else if z <= 0.52 {
@@ -93,40 +104,40 @@ fn setup(
         cells.push(Cell {
             kind: k,
             voronoi_id: i,
-            altitude: (z*255.) as u8,
-            vertices: vec![]
+            altitude: (z * 255.) as u8,
+            vertices: vec![],
         });
     }
-    
 
     let mut poss = Vec::new();
     let mut indices = Vec::new();
 
-    for (c, cd) in voronoi.iter_cells().zip(cells.iter_mut()).filter(|(_,cd)| cd.kind != CellKind::Forest) {
+    for (c, cd) in voronoi
+        .iter_cells()
+        .zip(cells.iter_mut())
+        .filter(|(_, cd)| cd.kind != CellKind::Forest)
+    {
         let vs = c.iter_vertices().collect::<Vec<_>>();
         let i = poss.len();
         for v in vs.iter() {
             poss.push(Vec3::new(v.x as f32, v.y as f32, 0.));
         }
-        for v in 1..(vs.len()-1) {
-            indices.extend_from_slice(&[i as u32, (i+v) as u32, (i+v+1) as u32]);
-            cd.vertices.extend_from_slice(&[i, i+v, i+v+1]);
+        for v in 1..(vs.len() - 1) {
+            indices.extend_from_slice(&[i as u32, (i + v) as u32, (i + v + 1) as u32]);
+            cd.vertices.extend_from_slice(&[i, i + v, i + v + 1]);
         }
     }
 
     let colors = vec![[0.; 4]; poss.len()];
-    let mesh = Mesh::new(PrimitiveTopology::TriangleList, RenderAssetUsages::default())
-        // Add 4 vertices, each with its own position attribute (coordinate in
-        // 3D space), for each of the corners of the parallelogram.
-        .with_inserted_attribute(
-            Mesh::ATTRIBUTE_POSITION,
-            poss
-        )
-        .with_inserted_attribute(
-            Mesh::ATTRIBUTE_COLOR,
-            colors.clone()
-        )
-        .with_inserted_indices(Indices::U32(indices));
+    let mesh = Mesh::new(
+        PrimitiveTopology::TriangleList,
+        RenderAssetUsages::default(),
+    )
+    // Add 4 vertices, each with its own position attribute (coordinate in
+    // 3D space), for each of the corners of the parallelogram.
+    .with_inserted_attribute(Mesh::ATTRIBUTE_POSITION, poss)
+    .with_inserted_attribute(Mesh::ATTRIBUTE_COLOR, colors.clone())
+    .with_inserted_indices(Indices::U32(indices));
 
     let mut cells_entities = Vec::with_capacity(cells.len());
     cmds.spawn((
@@ -136,74 +147,35 @@ fn setup(
         Voronoi(voronoi),
         MapColors(colors),
         MeshNeedsUpdate(true),
-        MapMarker
-    )).with_children(|parent| {
+        MapMarker,
+    ))
+    .with_children(|parent| {
         for cell in cells {
             let kind = cell.kind;
             let mut cmd = parent.spawn(cell);
             match kind {
                 CellKind::Grass | CellKind::Forest => {
-                    cmd.insert((Wealth(0), Regeneration {
-                        last_update: Duration::ZERO,
-                        full_growth_duration: kind.regen_full_growth_duration()
-                    }));
-                },
+                    cmd.insert((
+                        Wealth(0),
+                        Regeneration {
+                            last_update: Duration::ZERO,
+                            full_growth_duration: kind.regen_full_growth_duration(),
+                        },
+                    ));
+                }
                 _ => {}
             }
-            cmd.observe(|
-                    trigger: Trigger<Pointer<Click>>,
-                    mut cells: Query<&mut Cell>,
-                    mut map_needs_update: Query<&mut MeshNeedsUpdate, With<MapMarker>>,
-                    mut cmds: Commands,
-                    ca: Res<CurrentAction>,
-                    gt: Res<GameTime>,
-                | {
-                if trigger.duration > Duration::from_millis(200) {
-                    return
-                }
-                match *ca {
-                    CurrentAction::ChangeCell(ck) => {
-                        let mut cell = cells.get_mut(trigger.target).unwrap();
-                        match ck {
-                            CellKind::Forest => match cell.kind {
-                                CellKind::Dirt | CellKind::Grass => {
-                                    cmds.entity(trigger.target).insert((Wealth(0), Regeneration {
-                                        last_update: gt.current,
-                                        full_growth_duration: CellKind::Forest.regen_full_growth_duration()
-                                    }));
-                                    cell.kind = CellKind::Forest;
-                                    map_needs_update.single_mut().0 = true;
-                                },
-                                _ => {}
-                            },
-                            CellKind::Grass => match cell.kind {
-                                CellKind::Dirt => {
-                                    cmds.entity(trigger.target).insert((Wealth(0), Regeneration {
-                                        last_update: gt.current,
-                                        full_growth_duration: CellKind::Grass.regen_full_growth_duration()
-                                    }));
-                                    cell.kind = CellKind::Grass;
-                                    map_needs_update.single_mut().0 = true;
-                                },
-                                _ => {}
-                            }
-                            _ => {}
-                        }
-                    }
-                    _ => {}
-                }
-                
-            });
+            cmd.observe(self::cells::on_click);
             cells_entities.push(cmd.id());
         }
-    }).insert(CellsEntities(cells_entities));
-
+    })
+    .insert(CellsEntities(cells_entities));
 }
 
 fn update_map_mesh(
     cells: Query<(&Cell, Option<&Wealth>)>,
     mut map: Query<(&Mesh2d, &mut MapColors, &mut MeshNeedsUpdate), With<MapMarker>>,
-    mut meshes: ResMut<Assets<Mesh>>
+    mut meshes: ResMut<Assets<Mesh>>,
 ) {
     let (mesh, mut cols, mut needs_update) = map.single_mut();
     if needs_update.0 {
@@ -222,4 +194,4 @@ fn update_map_mesh(
         }
         needs_update.0 = false;
     }
-}
\ No newline at end of file
+}
diff --git a/src/map/cells.rs b/src/map/cells.rs
index 9904403..9e143aa 100644
--- a/src/map/cells.rs
+++ b/src/map/cells.rs
@@ -14,14 +14,14 @@ pub enum CellKind {
     Forest,
     Dirt,
     Stone,
-    Grass
+    Grass,
 }
 impl CellKind {
     pub fn regen_full_growth_duration(&self) -> Duration {
         match self {
             CellKind::Sea | CellKind::Beach | CellKind::Dirt | CellKind::Stone => unreachable!(),
-            CellKind::Forest => Duration::from_days(365*100), // Let's say that a forest takes 100 years to mature
-            CellKind::Grass => Duration::from_weeks(7) // Let's say that grass takes 7 weeks to reach its max
+            CellKind::Forest => Duration::from_days(365 * 100), // Let's say that a forest takes 100 years to mature
+            CellKind::Grass => Duration::from_weeks(7), // Let's say that grass takes 7 weeks to reach its max
         }
     }
 }
@@ -31,17 +31,27 @@ pub struct Cell {
     pub kind: CellKind,
     pub voronoi_id: usize,
     pub altitude: u8,
-    pub vertices: Vec<usize>
+    pub vertices: Vec<usize>,
 }
 impl Cell {
     pub fn color(&self, wealth: u8) -> [f32; 4] {
         match self.kind {
             CellKind::Sea => [0., 0., 1., 1.],
             CellKind::Beach => [0.82, 0.84, 0.51, 1.],
-            CellKind::Forest => [0., 0.5 - (wealth as f32/255.*0.4), 0., 1.],
-            CellKind::Dirt => [0.53 - (wealth as f32/255.*0.4), 0.38-(wealth as f32/255.*0.4), 0.29-(wealth as f32/255.*0.4), 1.],
+            CellKind::Forest => [0., 0.5 - (wealth as f32 / 255. * 0.4), 0., 1.],
+            CellKind::Dirt => [
+                0.53 - (wealth as f32 / 255. * 0.4),
+                0.38 - (wealth as f32 / 255. * 0.4),
+                0.29 - (wealth as f32 / 255. * 0.4),
+                1.,
+            ],
             CellKind::Stone => [0.5, 0.5, 0.5, 1.],
-            CellKind::Grass => [(136./255.) - (wealth as f32/255.*0.15), (154./255.) + (wealth as f32/255.*0.1), (59./255.) - (wealth as f32/255.*0.15), 1.]
+            CellKind::Grass => [
+                (136. / 255.) - (wealth as f32 / 255. * 0.15),
+                (154. / 255.) + (wealth as f32 / 255. * 0.1),
+                (59. / 255.) - (wealth as f32 / 255. * 0.15),
+                1.,
+            ],
         }
     }
 }
@@ -59,17 +69,17 @@ impl Default for Wealth {
 #[require(Wealth)]
 pub struct Regeneration {
     pub last_update: Duration,
-    pub full_growth_duration: Duration
+    pub full_growth_duration: Duration,
 }
 
 pub fn cells_regeneration(
     mut cells: Query<(&mut Regeneration, &mut Wealth)>,
     mut map_needs_update: Query<&mut MeshNeedsUpdate, With<MapMarker>>,
-    gt: Res<GameTime>
+    gt: Res<GameTime>,
 ) {
     let mut map_needs_update = map_needs_update.single_mut();
     for (mut regen, mut wealth) in cells.iter_mut() {
-        if gt.current - regen.last_update > regen.full_growth_duration/u8::MAX as u32 {
+        if gt.current - regen.last_update > regen.full_growth_duration / u8::MAX as u32 {
             regen.last_update = gt.current;
             wealth.0 = wealth.0.saturating_add(1);
             map_needs_update.0 = true;
@@ -82,7 +92,7 @@ pub fn expand(
     map: Query<(&Voronoi, &CellsEntities)>,
     mut cmds: Commands,
     t: Res<Time>,
-    gt: Res<GameTime>
+    gt: Res<GameTime>,
 ) {
     let (voronoi, cells_entities) = map.single();
     let mut random = thread_rng();
@@ -93,16 +103,37 @@ pub fn expand(
             let wealth = if cell.kind == CellKind::Forest {
                 1.
             } else {
-                wealth.unwrap().0 as f64/255.
+                wealth.unwrap().0 as f64 / 255.
             };
-            if random.gen_bool((t.elapsed_secs_f64()*(gt.speed as f64)*wealth/(60.*60.*24.*30.)).min(1.)) { // Let say that grass takes 1 months to expand
-                let target = voronoi.0.cell(cell.voronoi_id).iter_neighbors().choose(&mut random).unwrap();
+            if random.gen_bool(
+                (t.elapsed_secs_f64() * (gt.speed as f64) * wealth / (60. * 60. * 24. * 30.))
+                    .min(1.),
+            ) {
+                // Let say that grass takes 1 months to expand
+                let target = voronoi
+                    .0
+                    .cell(cell.voronoi_id)
+                    .iter_neighbors()
+                    .choose(&mut random)
+                    .unwrap();
                 changes.push((target, CellKind::Grass));
             }
         }
         if cell.kind == CellKind::Forest {
-            if random.gen_bool((t.elapsed_secs_f64()*(gt.speed as f64)*(wealth.unwrap().0 as f64/255.).sqrt()/(60.*60.*24.*365.*5.)).min(1.)) { // Let say that forest takes 5 years to expand
-                let target = voronoi.0.cell(cell.voronoi_id).iter_neighbors().choose(&mut random).unwrap();
+            if random.gen_bool(
+                (t.elapsed_secs_f64()
+                    * (gt.speed as f64)
+                    * (wealth.unwrap().0 as f64 / 255.).sqrt()
+                    / (60. * 60. * 24. * 365. * 5.))
+                    .min(1.),
+            ) {
+                // Let say that forest takes 5 years to expand
+                let target = voronoi
+                    .0
+                    .cell(cell.voronoi_id)
+                    .iter_neighbors()
+                    .choose(&mut random)
+                    .unwrap();
                 changes.push((target, CellKind::Forest));
             }
         }
@@ -110,18 +141,75 @@ pub fn expand(
     for (v_id, kind) in changes {
         let target = cells_entities.0[v_id];
         let (mut cell, _) = cells.get_mut(target).unwrap();
-        if kind == CellKind::Forest && (cell.kind == CellKind::Dirt || cell.kind == CellKind::Grass) {
+        if kind == CellKind::Forest && (cell.kind == CellKind::Dirt || cell.kind == CellKind::Grass)
+        {
             cell.kind = CellKind::Forest;
-            cmds.entity(target).insert((Wealth(0), Regeneration {
-                full_growth_duration: CellKind::Forest.regen_full_growth_duration(),
-                last_update: gt.current
-            }));
+            cmds.entity(target).insert((
+                Wealth(0),
+                Regeneration {
+                    full_growth_duration: CellKind::Forest.regen_full_growth_duration(),
+                    last_update: gt.current,
+                },
+            ));
         } else if kind == CellKind::Grass && cell.kind == CellKind::Dirt {
             cell.kind = CellKind::Grass;
-            cmds.entity(target).insert((Wealth(0), Regeneration {
-                full_growth_duration: CellKind::Grass.regen_full_growth_duration(),
-                last_update: gt.current
-            }));
+            cmds.entity(target).insert((
+                Wealth(0),
+                Regeneration {
+                    full_growth_duration: CellKind::Grass.regen_full_growth_duration(),
+                    last_update: gt.current,
+                },
+            ));
         }
     }
-}
\ No newline at end of file
+}
+
+pub fn on_click(
+    trigger: Trigger<Pointer<Click>>,
+    mut cells: Query<&mut Cell>,
+    mut map_needs_update: Query<&mut MeshNeedsUpdate, With<MapMarker>>,
+    mut cmds: Commands,
+    ca: Res<CurrentAction>,
+    gt: Res<GameTime>,
+) {
+    if trigger.duration > Duration::from_millis(200) {
+        return;
+    }
+    match *ca {
+        CurrentAction::ChangeCell(ck) => {
+            let mut cell = cells.get_mut(trigger.target).unwrap();
+            match ck {
+                CellKind::Forest => match cell.kind {
+                    CellKind::Dirt | CellKind::Grass => {
+                        cmds.entity(trigger.target).insert((
+                            Wealth(0),
+                            Regeneration {
+                                last_update: gt.current,
+                                full_growth_duration: CellKind::Forest.regen_full_growth_duration(),
+                            },
+                        ));
+                        cell.kind = CellKind::Forest;
+                        map_needs_update.single_mut().0 = true;
+                    }
+                    _ => {}
+                },
+                CellKind::Grass => match cell.kind {
+                    CellKind::Dirt => {
+                        cmds.entity(trigger.target).insert((
+                            Wealth(0),
+                            Regeneration {
+                                last_update: gt.current,
+                                full_growth_duration: CellKind::Grass.regen_full_growth_duration(),
+                            },
+                        ));
+                        cell.kind = CellKind::Grass;
+                        map_needs_update.single_mut().0 = true;
+                    }
+                    _ => {}
+                },
+                _ => {}
+            }
+        }
+        _ => {}
+    }
+}
diff --git a/src/map/picking.rs b/src/map/picking.rs
index d4a8f3e..54c392e 100644
--- a/src/map/picking.rs
+++ b/src/map/picking.rs
@@ -1,4 +1,11 @@
-use bevy::{picking::{backend::{HitData, PointerHits}, pointer::{PointerId, PointerLocation}}, prelude::*, window::PrimaryWindow};
+use bevy::{
+    picking::{
+        backend::{HitData, PointerHits},
+        pointer::{PointerId, PointerLocation},
+    },
+    prelude::*,
+    window::PrimaryWindow,
+};
 use voronoice::Point;
 
 use super::{CellsEntities, MapMarker, Voronoi};
@@ -8,7 +15,7 @@ pub fn picking_backend(
     window: Query<&Window, With<PrimaryWindow>>,
     pointers: Query<(&PointerId, &PointerLocation)>,
     map: Query<(&Voronoi, &CellsEntities, &Transform), With<MapMarker>>,
-    mut output: EventWriter<PointerHits>
+    mut output: EventWriter<PointerHits>,
 ) {
     let (cam, cam_id) = cam.single();
     let window = window.single();
@@ -16,24 +23,38 @@ pub fn picking_backend(
     let mut last_cell = 0;
     for (id, l) in pointers.iter() {
         if let Some(mut pos) = l.location().map(|l| l.position) {
-            pos -= window.size()/2.;
+            pos -= window.size() / 2.;
             pos *= cam.scale.xy();
             pos.x += cam.translation.x;
             pos.y -= cam.translation.y;
-            if let Some(c) = voronoi.0.cell(last_cell).iter_path(Point { x: pos.x as f64, y: -pos.y as f64 }).last() {
+            if let Some(c) = voronoi
+                .0
+                .cell(last_cell)
+                .iter_path(Point {
+                    x: pos.x as f64,
+                    y: -pos.y as f64,
+                })
+                .last()
+            {
                 last_cell = c;
                 output.send(PointerHits {
                     pointer: *id,
-                    picks: vec![(cells_entities.0[c], HitData {
-                        camera: cam_id,
-                        depth: map_pos.translation.z,
-                        position: Some(Vec3 { x: pos.x, y: pos.y, z: map_pos.translation.z }),
-                        normal: None
-                    })],
-                    order: map_pos.translation.z
+                    picks: vec![(
+                        cells_entities.0[c],
+                        HitData {
+                            camera: cam_id,
+                            depth: map_pos.translation.z,
+                            position: Some(Vec3 {
+                                x: pos.x,
+                                y: pos.y,
+                                z: map_pos.translation.z,
+                            }),
+                            normal: None,
+                        },
+                    )],
+                    order: map_pos.translation.z,
                 });
             }
-
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/time.rs b/src/time.rs
index dcfeabb..57f5f50 100644
--- a/src/time.rs
+++ b/src/time.rs
@@ -6,23 +6,20 @@ pub struct Plugin;
 impl bevy::prelude::Plugin for Plugin {
     fn build(&self, app: &mut App) {
         app.insert_resource(GameTime {
-                current: Duration::ZERO,
-                speed: 24. * 60. * 60. * 10.
-            })
-            .add_systems(PreUpdate, update_time);
+            current: Duration::ZERO,
+            speed: 24. * 60. * 60. * 10.,
+        })
+        .add_systems(PreUpdate, update_time);
     }
 }
 
 #[derive(Resource)]
 pub struct GameTime {
     pub current: Duration,
-    pub speed: f32 // = game time / real time
+    pub speed: f32, // = game time / real time
 }
 
-fn update_time(
-    mut gt: ResMut<GameTime>,
-    time: Res<Time>
-) {
+fn update_time(mut gt: ResMut<GameTime>, time: Res<Time>) {
     let speed = gt.speed;
     gt.current += Duration::from_secs_f32(time.delta_secs() * speed);
-}
\ No newline at end of file
+}
diff --git a/src/ui.rs b/src/ui.rs
index d839bad..94a7985 100644
--- a/src/ui.rs
+++ b/src/ui.rs
@@ -1,13 +1,24 @@
+use bevy::{
+    asset::embedded_asset,
+    input::mouse::MouseWheel,
+    math::{NormedVectorSpace, VectorSpace},
+    picking::{focus::HoverMap, pointer::PointerId},
+    prelude::*,
+    utils::{dbg, HashMap},
+    window::PrimaryWindow,
+};
 use mevy::*;
-use bevy::{asset::embedded_asset, input::mouse::MouseWheel, math::{NormedVectorSpace, VectorSpace}, picking::{focus::HoverMap, pointer::PointerId}, prelude::*, utils::{dbg, HashMap}, window::PrimaryWindow};
 
-use crate::{animals::AnimalKind, map::{self, CellKind, MapMarker}};
+use crate::{
+    animals::AnimalKind,
+    map::{self, CellKind, MapMarker},
+};
 
 // #77767b
-const TABBAR_COLOR: Color = Color::srgb(119./255., 118./255., 123./255.);
+const TABBAR_COLOR: Color = Color::srgb(119. / 255., 118. / 255., 123. / 255.);
 
 // #E8E8E8
-const ENABLED_BUTTON_COLOR: Color = Color::srgb(232./255., 232./255., 232./255.);
+const ENABLED_BUTTON_COLOR: Color = Color::srgb(232. / 255., 232. / 255., 232. / 255.);
 
 pub struct Plugin;
 impl bevy::prelude::Plugin for Plugin {
@@ -31,7 +42,7 @@ pub enum CurrentAction {
     #[default]
     None,
     ChangeCell(CellKind),
-    AddAnimal(AnimalKind)
+    AddAnimal(AnimalKind),
 }
 
 #[derive(Component, Debug)]
@@ -40,12 +51,9 @@ struct PointersDragging(HashMap<PointerId, Vec2>);
 #[derive(Component)]
 pub struct MapUIComponent;
 
-fn setup(
-    mut world: Commands,
-    asset_server: Res<AssetServer>
-) {
+fn setup(mut world: Commands, asset_server: Res<AssetServer>) {
     // Spawn all ui elements as children of this one
-    spawn!{
+    spawn! {
         Node {width: 100%, height: 100%, display: Display::Flex, flex_direction: FlexDirection::Column, !};
         PickingBehavior {
             should_block_lower: false,
@@ -67,17 +75,17 @@ fn setup(
                         return
                     }
                     let mut cam = cam.single_mut();
-                    
+
                     let old_midpoint = ptrs.0.values().fold(Vec2::ZERO, |acc, pos| acc + (pos/ptrs.0.len() as f32));
                     let old_d_to_midpoint = ptrs.0.values().fold(0., |acc, pos| acc + (old_midpoint-pos).norm());
                     ptrs.0.insert(trigger.pointer_id, trigger.pointer_location.position);
                     let new_midpoint = ptrs.0.values().fold(Vec2::ZERO, |acc, pos| acc + (pos/ptrs.0.len() as f32));
                     let new_d_to_midpoint = ptrs.0.values().fold(0., |acc, pos| acc + (new_midpoint-pos).norm());
-    
+
                     // move camera
                     cam.translation.x -= (new_midpoint.x - old_midpoint.x)*cam.scale.x;
                     cam.translation.y += (new_midpoint.y - old_midpoint.y)*cam.scale.y;
-                
+
                     if ptrs.0.len() > 1 {
                         cam.scale *= old_d_to_midpoint/new_d_to_midpoint;
                     }
@@ -182,15 +190,20 @@ fn zoom_with_scroll(
     mut ev_scroll: EventReader<MouseWheel>,
     hover_map: Res<HoverMap>,
     window: Query<&Window, With<PrimaryWindow>>,
-    map_ui_id: Query<Entity, With<MapUIComponent>>
+    map_ui_id: Query<Entity, With<MapUIComponent>>,
 ) {
     let map_ui_id = map_ui_id.single();
-    if hover_map.get(&PointerId::Mouse).and_then(|hovered_ids| hovered_ids.get(&map_ui_id)).is_some() {
+    if hover_map
+        .get(&PointerId::Mouse)
+        .and_then(|hovered_ids| hovered_ids.get(&map_ui_id))
+        .is_some()
+    {
         let window = window.single();
         let mut cam = cam.single_mut();
         for ev in ev_scroll.read() {
-            let scale = (cam.scale.x-(ev.y*0.1/window.width().min(window.height()))).clamp(0.0001, 2./window.width().min(window.height()));
+            let scale = (cam.scale.x - (ev.y * 0.1 / window.width().min(window.height())))
+                .clamp(0.0001, 2. / window.width().min(window.height()));
             cam.scale = Vec3::new(scale, scale, scale);
         }
     }
-}
\ No newline at end of file
+}