This will let you have pop-up targets that start down and popup when you enter a trigger and then will stay down until you leave and re-enter the trigger. It requires no scripts.
Set Up
You need:
A game logic with “nopop = true;” in it's init
A trigger with “{_x setDamage 0; _x animate[“terc”, 0];} forEach (synchronizedObjects thisTrigger)”
A popup target (find one under “Objects Training”) with “this setDamage 1; this animate[“terc”, 1]” in it's init
Synchronise the popup target to the trigger
You can add more popup targets and sync them to the trigger and they'll all popup when a player enters the trigger.