When it comes to detailed animation, we expect it to occupy a good amount of storage. Generally speaking, that rule holds true for most circumstances, and so it is quite a pleasant surprise to realize someone made an animation as detailed as this, using only a fraction of storage that would be expected; or to be exact, it only requires an extremely low 64 kilobytes.
The animation is titled The Timeless and was displayed at the programmer demoparty Revision in Saarbrücken, Germany. Programmers gather every year at the party to show off their work, all limited in file size to 64 kB. Graphics and music for the file are all generated algorithmically, in a process called Procedural generation. Impressive stuff.