QUOTE
the units you buy spawn by your probe.
When you want to spawn a unit by the probe, have a center location action centering on the probe before the creation trigger.QUOTE
i have 1 devouring one spawn a spawning pool ever 10 seconds but i dont know how to have it spawn by the pool to start with and have it do the same thing for multiple pools
Use this Trap-Bunker System for detecting the buildings, then spawn the units.