A showerhead assembly is provided which includes an outer housing and inner housing. The inner housing includes a support disk and gear housing disk having two diverter arms and a gear train. The gear train includes a propeller, a coaxial pinion, and a large gear. The outer housing includes the base and a faceplate having nozzle systems connecting to complementary orifices. Water enters the internal housing via a channel where it is further diverted by the diverter arms so as to impinge on the gear train's propeller, causing the gear train's individual components to rotate. Upon the rotation of the large gear, the large gear's slot aligns with a selected orifice whereby water travels through and enters a corresponding nozzle system. This sequence continues, causing water to sequentially spray from individual nozzles in systematic intervals so as to create a strobe-like spray pattern.