Automatic Tower Builder (Redstone Invention)

Very useless. But fun! This device will build a tower up to 12 blocks high. It is made of cobblestone.

Water bucket

Lava bucket

Piston

Redstone dust

Dirt

See https://www.instructables.com/id/How-to-Make-a-Cobblestone-Generator-in-Minecraft/ if you don't know how.

If you don't know how to make one see https://www.instructables.com/id/Minecraft-Short-Pulse-Clock/