uniform half4 colorGreen, colorRed;

half4 main(float2 coords) {
    bool4 inputVal = bool4(colorRed.rrba);   // TTFT
    bool4 expected = bool4(colorRed.rgbb);   // TFFF

    const bool4 constVal = bool4(true, true, false, true);
    return (all(inputVal.xy)   == expected.x &&
            all(inputVal.xyz)  == expected.y &&
            all(inputVal.xyzw) == expected.z &&
            all(constVal.xy)   == expected.x &&
            all(constVal.xyz)  == expected.y &&
            all(constVal.xyzw) == expected.z) ? colorGreen : colorRed;
}