3D loading animation

Inspired by Hoang Nguyen's flip-book style loading animation as well as this 3D style from Marcel Robert: https://dribbble.com/shots/881970-Loader-02-WIP-Animation

So much so that I decided to combine the two! :D

I wanted something subtle that could appear out of nowhere at the bottom of a blog page or some other kind of online-reading, then disappear as quickly as it came.