TrBoingX<MILLIS_FUNCTION, N>
TrBoing<MILLIS, N>
Similar to TrFade, but transitions back and forth between the two colors several times. (As specified by N). If N is 0, it's equal to TrFade. If N is 1 it transitions A-B-A-B, if N is 2, it is A-B-A-B-A-B, and so on.