I am making a Halloween costume for my son and it needs some light. Basically he's a character from the Mario Bros universe that carries a traffic light on a fishing pole (Lakitu in Mario Kart). I am trying to figure out a way to light the traffic lights red, green, and yellow lights using leds in a single circuit that would turn them on and off independently. Just something simple that goes red, then yellow, then green, then back to red over and over. Is there something to build or a circuit diagram? I really have never done any wiring like this ever, so the easier the better. Thanks for your help.