uniform half4 colorGreen, colorRed;

inline half4 trueSide(half4 v) {
    return v.r1ba;
}

inline half4 falseSide(half4 v) {
    return v.r0ba;
}

half4 main(float2 coords) {
    return bool(colorGreen.g) ? trueSide(colorGreen) : falseSide(colorRed);
}