long color = 0x000000;

color = 0xFFFFFF

for (int color = 0x000000; color <= 0xFFFFFF; ++color)

const int step = 8; // Select this to be a power of two if you want the maximum brightness to be reachable
for( int red = 0x00; red <= 0xFF; red += step ) {
    for( int green = 0x00; green <= 0xFF; green += step ) {
        for( int blue = 0x00; blue <= 0xFF; blue += step ) {
            const int color = blue << 16 + green << 8 + red;
            // Change the led settings here.
        }
    }
}

for(int hue=0; hue<360; hue++)
    setColorHSV(hue,1,1);

unsigned int i;
for(i = 0; i <= 0xFF; i++)
{
    rgb = 0xFF0000 | i<<8;
    setLed(rgb);
}
while(--i > 0)
{
    rgb = 0x00FF00 | i<<16;
    setLed(rgb);
}
for(i = 0; i <= 0xFF; i++)
{
    rgb = 0x00FF00 | i;
    setLed(rgb);
}
while(--i > 0)
{
    rgb = 0x0000FF | i<<8;
    setLed(rgb);
}
for(i = 0; i <= 0xFF; i++)
{
    rgb = 0x0000FF | i<<16;
    setLed(rgb);
}
while(--i > 0)
{
    rgb = 0xFF0000 | i;
    setLed(rgb);
}