toggle
Stay in sync from afar (or don't)
Keep one toggle and give the other to a friend. The light stays green as long as they're both flipped the same way. Give yours a flip to turn your friend's toggle red.
How long will it take them to notice? Will they return the toggles back to green, or will they flip theirs again and turn YOURS red?
Check the leaderboard to see who's spent the most time out of the red!