"Preserve Trigger" Equivalent?

Okay, here`s my trigger:

Events:
Map Initialization

Conditions:
(Number of units in (Units owned by Player 10 (Light Blue) of type Black Spider) Equal to 0

Actions:
Create 10 Black Spider for Player 10 (Light Blue) at (Center of Creeps BlackSpider LVL 1 <gen> facing Default building facing degrees

This trigger WILL create the 10 Black Spiders for Player 10 when the map starts, but when they`re all dead, nothing happens.

Now, I want it so when the player comes in and kills those 10 Black Spiders owned by Player 10 that it will create another 10. However, I don`t want it to constantly be creating more and more so there are, like, 100 or whatever; I want it to wait until the original 10 are dead.

Thanks,
Nikolae

its always on preserve trigger its your event thats the problem as it'll only luanch once. Change it to periodic event.

I've tried that, and it still doesn't work.

make it a periodic event every 1 sec
it MUST work

Aha. Your problem is that dead units still count as units. You should make it so that the 10 spiders are in a unit group, and when a spider dies a trigger removes it from the group. Then when the group has 0 units, it'll create another 10.

Create the spiders one at a time. Set each spider to a variable. When each of the 10 variables is dead, the condition will be met.

Don't have "Map Initialization" as the event. Make the event periodic timer... I guess.

In some cases, use "Trigger - Turn on (this trigger)" to be equal to SC's Preserve Trigger.

Just make them explode on death. That way they leave no corpses.

Or do this: Have the trigger event be periodic every 1 second
Conditions: Unit group X is empty

Actions:
Create spider
add spider to unit group X

Repeat for each spider, Dead units are no longer parts of unit groups