How would I make a "lights out" event?

[wingwave]

Please Never Use Repeaters (and a guide on looping)

This is really important. I see so many people using repeaters, but they are literally THE MOST USELESS DEVICE IN THE GAME. Everything about a repeater is inefficient. Let’s start with their most basic functionality. Repeating a signal. Let’s say it sends out on channel X every second. WOAH! We can do that with triggers too! If it has a delay of one, sends on channel X, and receives on channel X, WOW! It’s literally the same exact thing but with TEN TIMES THE MEMORY EFFICIENCY. Let me tell…