struct VertexOutput {
    @builtin(position) position : vec4<f32>,
    @location(0) color : vec3<f32>,
}

@vertex
fn main(
    @location(0) position : vec3<f32>,
    @location(1) color : vec3<f32>
) -> VertexOutput {
    var output: VertexOutput;
    output.position = vec4<f32>(position, 1.0);
    output.color = color;
    return output;
}