half4 helper();

void main() {
    sk_FragColor = helper();
}

struct Color {
    half red;
    half green;
    half blue;
    half alpha;
};

half4 helper() {
    Color c;
    c.red   = 0.25;
    c.green = 0.5;
    c.blue  = 0.75;
    c.alpha = 1.0;
    return half4(c.red, c.green, c.blue, c.alpha);
}