shader_type canvas_item;

uniform vec4 base_color: hint_color = vec4(0.0, 0.0, 0.0, 1.0);

void fragment(){
    COLOR = texture(TEXTURE, UV);  //read from texture

    if (COLOR.a > 0.5) {

        float result = mod(UV.x * UV.y * 4.0, 0.2);

        if ((result > 0.00 && result < 0.01) || result > 0.95) {
            // Red
            COLOR.r = 0.71764;
            COLOR.g = 0.31764;
            COLOR.b = 0.298039;
        } else if (result > 0.03  && result < 0.06) {
            // Green
            COLOR.r = 0.0666;
            COLOR.g = 0.6156;
            COLOR.b = 0.46666;
        } else {
            // Black
            COLOR.r = base_color.r;
            COLOR.g = base_color.g;
            COLOR.b = base_color.b;
            COLOR.a = base_color.a;
        }
    }
}