How to create and start timers?

[Trigger Noob =]]

I'm making a map similar to maps like tree tag and sheep tag. How do I make the timers.
So far I've got this :
E:
C:
A: Countdown Timer - Create a timer window for Timer with title Time left
Countdown Timer - Show (Last created timer window)
Countdown Timer - Start Timer as a One-shot timer that will expire in 1200.00 seconds
I've also tried other ways but they don't seem to work. How do I do it?
:scary

[Chris]

Don't you need an event. Like when the map starts or something?

Cause the code for that is correct.

[x42bn6]

Think of Event-less triggers as things that can be repeatedly executed but at any time. This is why you need something to "trigger" that trigger. Like Chris says, the Melee Initialization trigger or a sensible start (like player chooses hero).*

[Chris]

I guess in other words: It is like the Always and Perserve Trigger functions in Starcraft.

Melee Initialization may not be the answer. You can try editing that trigger, or you can just make it activate when .01 second or a generic event happens.