BlinkingF<A, B, BLINK_MILLIS_FUNC, BLINK_PROMILLE_FUNC>
Switches between 0 and 32768 A full cycle from 0 to 328768 and back again takes BLINK_MILLIS milliseconds. If BLINK_PROMILLE is 500, we select A for the first half and B for the second half. If BLINK_PROMILLE is smaller, we get less A and more B. If BLINK_PROMILLE is 0, we get all 0. If BLINK_PROMILLE is 1000 we get all 32768.