Minecraft wiki entry for Rube_Goldberg_machine, associated text: Redstone blocks are a source of power. To make "Pistone", make a piston push a redstone block into the rear end of another piston that pushes a redstone block into another piston. Also, players could place a piston where the redstone block originally was, so when the piston pushes it, piston 2 unpowers. The player could make it a sticky piston that pulls a powered block away from another piston.