It would be used with bricks. I'm working on a project with zomibes that are behind a wall. This is what I want it to look like:
[5000] [onMinigameStart]-[ZombieDoor]-[fireRelay]
[10000] [onRelay]-[ZombieDoor]-[fireRelay]
- [onRelay]-ZombieDoor]-[Disappear]-[10]
Something like that. That way, I have constant waves of zombies.