A google search is always a good place to start. A search for “led traffic light circuit” circuit turns up a variety of hits, this one from Instructables may be useful (there are others that use 555 timers in the list as well if you don’t want a micro involved.)
A further google search for “fritzing part led traffic light” turns up a variety of Frtizing projects that also may help. There is a frtizing part for the traffic light module available here: