Stop a previous event

How do I stop a previous event. Example:

Event 1: System Every 1.0 Seconds Substract 1 from TimeCount (variable that keeps a value of time = 30)

Event 2: System when TimeCount equals 0, stop substracting from Time Count and end layout.

I know it sounds simple, but any ideas on how to do it using C2?

Add another condition to event 1: If TimeCount > 0.

Set event 2 to just be: If TimeCount = 0, end layout.

Worked like a charm hehehe!! Thanks GeometriX!!!!