uniform half4 colorGreen, colorRed;

half4 main(float2 coords) {
    int a = 0, b = 0, c = 0, d = 0;
    if (true) a = 1;
    if (2 > 1) b = 2; else b = 3;
    if (1 > 2) c = 4; else c = 5;
    if (false) d = 6;
    return (a == 1 && b == 2 && c == 5 && d == 0) ? colorGreen : colorRed;
}