Creep Respawn Trigger

Okay, I have a problem.
The problem is, how do I make a respawn trigger, where it will respawn units over a 20-25 second period time.
If anyone has played Defiances ORPG, that is exactly how I want my respawn trigger to work, where you can kill many different types of units within the 20-25 time period, and it will still respawn each different unit within the time they have died, and the exact place where they were put on the map, etc. etc.

Any help will be greatly appreciated.

Easiest way with such a long wait is as follows.
Create a new trigger in the WE and use a death event.
Then perform a wait and recreate a unit of the same unit type at the position of the dead unit.

Notice that this may not be 100% accurate due to the unit not dying where you want the respawn to be.
You may need to use custom values or some such and orient them to specific coordinates on the map.

It'll look something akin to that.

You won't be able to reference the local unit variable in the GUI action. You could just use the local-global trick (also leaks :>).

Heck, if it were me I'd do the whole thing in jass. :/
But yeah, you'd probably use the local global trick if you wanted gui.

So, how do I do this so it will create the unit where he was placed on the map?
Unfortunatly, I don't understand JASS, yet, and wouldn't know how to script it myself. I can probably do it, with some assistance though.

Custom Values.
Coordinate a custom value to a point on the map via some array or whatever.
Then recall that location based on the CV of the unit that dies.

You could generate them through a trigger since the beginning. Everytime you want to respawn, just call it again.