A game where a light "moves" across a row of LEDs and the object of the game is for the player to stop the "moving light" on a LED that is a different color than the rest, thus testing their reflex. The game is based around the 4017b which takes a clock in from a 555 timer. A potentiometer allows the player to adjust the rate at which the LED sequence cycles. This game resembles the arcade games where there is a circle of lights and the player needs to stop the light at a certain spot to win tickets.