How to enable CRT Animations (Both On and Off) on AOSP based roms?

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http://forum.xda-developers.com – I'm sure this isn't device specific as it is AOSP based Roms that I am talking about. But how are the CRT Animations enabled on AOSP roms?, and where is the source for both the animations found? I've been researching everywhere for bot my questions and can't find anything. There might be small differences per device, but as AOSP roms can be found on quite a few devices there must be more than a few similarities in enabling them. (HowTos)