diff --git a/shaders/mesh_forward.wgsl b/shaders/mesh_forward.wgsl
index d4a8d89..bc2a3a1 100644
--- a/shaders/mesh_forward.wgsl
+++ b/shaders/mesh_forward.wgsl
@@ -34,5 +34,5 @@ fn vs_main(
 fn fs_main(
   frag: VertexOutput,
 ) -> [[location(0)]] vec4<f32> {
-  return vec4<f32>(1.0);
+  return vec4<f32>(sin(frag.position) * vec3<f32>(0.5) + vec3<f32>(0.5), 1.0);
 }