Traffic light activity inspired by this set.
Pins
GP0 - Road lights
GP1 - Side Street traffic light GREEN
GP2 - Side Street traffic light YELLOW
GP3 - Side Street traffic light RED
GP4 - Main Street traffic light GREEN
GP5 - Main Street traffic light YELLOW
GP6 - Main Street traffic light RED
GP7 - Car sensor corner #2
GP8 - Car sensor corner #4
GP9 - Pedestrian walk signal corner #2
GP10 - Pedestrian walk signal corner #4
GP11 - Light sensor
Please note, if you are using a web editor such as https://code.circuitpython.org/, make sure
you disable the USB mass storage device mode using the file boot.py.