Does anybody have an existing circuit for a drag race tree or can make on up? I've seen them with microcontrollers and relays here and there. I want to use logic ic's, led's and something like a 6v power source and no clock. I don't need any fault start or pre-stage lights, just the count down to green. Probably like 3-4 yellow then a green. I've made chasers, counters and basic stuff before but need some help. I also have Multisim if anyone has something in that.