Showerhead and showerhead engine for rotating spray

A showerhead engine includes a first plate joined to a second plate with a cavity therebetween. Water enters the cavity through an angled hole in the first plate and flows in a swirling motion about the central axis. A paddle wheel is spun within the cavity by the swirling water. A notched cutout in the paddle wheel forms an exit passage through a through hole in the second plate allowing the water to exit when the notched cutout lines up with slots in the second plate. The revolving paddle wheel continues to revolve thereby revolving the notched cutout and producing a revolving spray pattern.