Abstract: Disco structure comprising a series of triangular elements or prisms mounted for rotation individually or in groups or sub-groups and defining a floor space. Light or projectors are provided for impinging light and/or images on the rotating elements or prisms which are reflective and/or colored on their surfaces and a transparent or translucent shield is disposed inwardly of the elements or prisms through which light rays or beams pass. Sound waves are propagated by a live or inanimate source and a laser beam or other light source revolves in the ceiling over the floor space. A reversible electric motor drives shafts in the elements or prisms through a belt and gearing arrangement.