It means: Don't code while driving. For safety.

I think they mean don't play a light show while driving. You need things like blinkers, tail lights, etc. to function as intended for safety reasons. Many places have strict laws about exactly what kinds of lights can and can't be on a car in motion.

Doesn’t work while driving. GP was trying to make a Reddit like snark comment due to other stories about games being allowed while driving.

Well, that's less funny. I was thinking of that auto-pilot feature in Tesla. Which gives one time to code.