A procedurally generated pixel-art wallpaper!
You will get randomly generated worlds with water, forests, hills, roads and various other features on your background.
The 8-bit/pixel-artsy tileset is made by "surt" on Open Game Art (opengameart.org), released under CC0.
8Bit live wallpaper started as a game for the Procedural Death Jam, but because of time pressure it became a wallpaper instead.