diff --git a/src/shader.wgsl b/src/shader.wgsl
new file mode 100644
index 0000000..baf7775
--- /dev/null
+++ b/src/shader.wgsl
@@ -0,0 +1,16 @@
+// Vertex shader
+
+struct VertexOutput {
+    @builtin(position) clip_position: vec4<f32>,
+};
+
+@vertex
+fn vs_main(
+    @builtin(vertex_index) in_vertex_index: u32,
+) -> VertexOutput {
+    var out: VertexOutput;
+    let x = f32(1 - i32(in_vertex_index)) * 0.5;
+    let y = f32(i32(in_vertex_index & 1u) * 2 - 1) * 0.5;
+    out.clip_position = vec4<f32>(x, y, 0.0, 1.0);
+    return out;
+}
\ No newline at end of file