Minecraft wiki entry for Clock, associated text: This nearly-flat circuit (also known as a ring counter) takes a clock input of period P and any pulse length, and outputs as a clock of period N×P, where N is the number of latches used; the output is on for a pulse length of P, and off for the remaining (N-1)×P. N is limited to 12 or so by redstone signal attenuation; however, the design can simply be repeated to multiply the period again, e.g. a 21-multiplier can be made by chaining a 7-multiplier and a 3-multiplier. This can be continued indefinitely, and unlike factorial stacking there is no restriction on the multipliers.