How to control the Level Overrides using an MVBA

It has been a very VERY long time since I had to do anything in MVBA. All I need is an example or point me in the right direction. I'm trying to setup a VBA that will turn on the Level Overrides then turn on specific levels overrides and set the color. I want to, set all of the levels that have existing elements to a very light gray and fade them back. I don't mind doing research so any help would be appreciated. I just need to know a direction to start looking.

Thank you

Phillip Hess