Like I said... in ISIS when the pot is one extreme the leds sweep fast and then when its at the other it sweeps slow. to make it go back and forth you need to hook the flip flop to the up/down input of the counter....However! i put 200ohm resistors on the led pack and ....You're right that's what the flip flop is for..
Back and forth the pot slows it down then speeds it up
Back and forth the pot slows it down then speeds it up