precision mediump float;

out vec4 color;
in vec2 screen_pos;
in vec2 uvs;

void main(){
    int x = int(uvs.x / 0.1);
    int y = int(uvs.y / 0.1);
    if ((x+y)% 2 == 0){
        color = vec4(1.0, 1.0, 1.0, 1.0);
    }
    else{
        color = vec4(0.1, 0.1, 0.1, 1.0);
    }
}