uniform half4 colorGreen;

inline half4 initLoopVar() {
    return half4(0.0625);
}

inline bool shouldLoop(half4 v) {
    return v.x < 0.5;
}

inline half4 grow(half4 v) {
    return v + half4(0.125);
}

half4 main(float2 coords) {
    for (half4 color = initLoopVar(); shouldLoop(color); color = grow(color)) {}

    return colorGreen;
}