fixing traffic light sequencing

[RyanCather]

The traffic lights needed to have their sequencing fixed using the digitalwrite function. this would fix the sequencing making it work like normal traffic lights. We adjusted the digital write to keep the red light on for tl2 and kept the tl1 red when tl2 yellow is on. tl stands for traffic lights.

for the client: any feedback for other potential solutions. @RyanCather

[RyanCather]

Good improvement on the previous coder's attempt. Visually, much better. Approved.