0 | OnActivate | Client | Centerprint | 3
1000 | OnActivate | Client | Centerprint | 2
2000 | OnActivate | Client | Centerprint | 1
3000 | OnActivate | Client | Centerprint | 0
Effectively makes "3 ... 2 ... 1 ... 0" appear (without the ...'s) as a centerprint on the screen of the player to activate the brick. And please place this in Help next time.