Use all colors in random pixel example and fix vtimer overflowing #23
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Hello,
the vtimer almost always overflows during the calculation in the micros() function, because the calculation is done with unsigned / 16-bit precision and then the result is converted to unsigned long / 32-bit precision.
Overflow also occurs in the millis() function after ~65 seconds.
Both can be easily fixed by using unsigned long instead of unsigned for vtimer.
Best regards