Use a game overlay like this:
then put down a speed modifier like this:
then use a wire repeater like this:
then overlay to the wire repeater then wire it back like this:
New wire repeater:
then put down a new speed modifier:
Then wire the overlay to the repeater (the new one you put down) and then the repeater to the speed modifier. New game overlay:
New repeater:
New repeater:
Then make a loop from the second overlay to the fourth repeater:
