Program running out of sync after arbitrary amount of time

[xopr]

When running two traffic lights, eventually they will go out of sync and switch to "maintenance mode"

STEPS TO REPRODUCE

• start two traffic lights
• wait a couple of minutes

CURRENT RESULT

• "maintenance/blink mode" will be activated by one of the lights, taking the other one with it

EXPECTED RESULT

• both should just run as normal, handing off / releasing the intersection for one another

ADDITIONAL NOTES

• most likely, one of the sent commands is not received (properly) by the other which will trigger maintenance mode due to timeout
• this might be mitigated by repeatedly sending the "red" and "release intersection" until the other light responds with "standby" and "prepare green" respectively
• maybe rename "prepare green" to "take intersection"