Introduction - If you have any usage issues, please Google them yourself
Traffic light control experiment (green, red stuff intersection north and south at the same intersection about 3 seconds bright
Several north-south crossing flashing yellow light, red light intersection while things continue to light
North-south crossing a red light, green light intersection at the same time something bright about 3 seconds
Continue north and south intersection red light, yellow light flashes while crossing a number of things
) And a programmable timer/counter