I own an old copy of AE CS6 I rarely use. When I do... I have a good time.
I took a triangle, threw some animated circle shape masks over it, and wave warped it a few times. Duped and Choked it to get the inner core. Add some color and glow and there you go. Block Loader works better than Mosaic most times to get the fake pixel flavor, so I went with that. 10/10 will do it again.