enemy spawn without coroutine?

Hey guys, I was playing around in the shooter tutorial and had decided to spawn my enemies. I realized that I hadn't even checked the full version of the shooter in a while and doubled back to it.. After looking through the scripts a number of times I realized there's no scripting text for enemy spawn. What I figure is this:

Through maneuverTime and maneuverWait you're forcing the spawn after startWait in the IEnumerator (Evade) section (the scripts have to run because of a set time to run script, enabling the rest of the script's references to follow, bypassing the need to start a routine). I was hoping someone could verify and maybe provide a little more insight.

Thanks in advance.