#import bevy_pbr::{
    mesh_view_bindings::globals,
    forward_io::VertexOutput,
}

@fragment
fn fragment(in: VertexOutput) -> @location(0) vec4<f32> {
    let pos: vec2<f32> = 10 * floor(3500 * in.uv);
    let brightness: vec3<f32> = vec3(max((fract(dot(sin(pos),pos)) - 0.995) * 90.0, 0.0));
    return vec4<f32>(0.01 * brightness, 1.0);
}