Engineer-Joe, I think Stan's video above using the ready made timers & relays would be the easiest and probably even the most reliable. Stan also knows a LOT more than I ever will, so I am sure everything Stan posts will work without a hitch.
But, if you are ever interested in any of the 3 aspect signal controller boards Rod and I have been experimenting with, I would be happy to help you get going with them. There are also some other circuits from the same source with the same functions that might be a little simpler and would use fewer parts.
I can't design anything from scratch, but I have learned how to cobble together a schematic in Diptrace, get some PCBs made from it, and get some parts, etc. (Diptrace does the heavy lifting, along with the original circuit designer). I would be happy to help others learn to do the same with that part of the process.
These experiments are a lot of fun for me, whether I ever use the circuits or not. I also learn something along the way. It's also extremely nice to have good folks like Stan and GRJ to help when one gets stuck. I'd never make it without them! Probably would have never started experimenting with these things without their help either.
