Stopping Trigger Help

[nandosman]

I'm doing a trigger in jass that creates an visual effect, it takes 20 sec creating the effect; the trigger activates when a unit channels X abilitie, i would like to know how to stop the remainings actions of the trigger if in the 15 second the unit stops channeling, dont know if u understand what i mean...

 

[AceHart]

If your unit's current order is not the order from the spell anymore... it stopped.

 

[Exide]

>..stop the remainings actions of the trigger..

return gives you that.
If / Then / Else - If your condition blabla then 'return', and your trigger will be stopped.