Need help with trigger!!

Ok, im preety much a noob on the triggering and stufff... i want to make so when every unit of a player in an area dies it does action. All i need really help in is in the action: When all units of plaxer x in area dies do action. THX:////

Set event to

Unit owned by player X dies

Condition should be

Integer/Real comparison

# of units in region ________ equal to 0


Then put your action.

OH thx that works :D