Same as title, How do I get a computer to Scan repeatedly??? (Will need to scan every 50 Miliseconds)
I've gone through AI Triggers, And I can't influence the computer to scan that fast by having it be terran and getting units attacked by cloaked units, and I'm out of ideas

You can't have anything happen every 50 milliseconds. Triggers can't run that fast. Try removing the scanner sweep immediately after it's cast to see if you can get the computer to reuse it.

Tried that already- No avail.

The reason why is to re-create rain.
Scouts are loud, and I have some difficulty controlling where and what they target (But i can, with time and lots of units)
Scanning seemed like a good option...
Text is out of the question, because I'm not able to center their screens.

Ideas?

observers...

No, Like Rain Rain. Not blurs.
---Edit---
Nevermind, I got my solution now.

I was going to say switch between two different defending computers, the computer that uses the scanner sweep. Then each of them will have to use scanner sweep to see the unit, but I highly doubt it will work that fast.