Glass or metal wheel, fixed or rotating, spread over several concentric circles with instant access to each gobo.The number of gobos available depends on the size of the wheel and the diameter of each gobo. It is possible to use one or more circles to achieve any number of continuous animation effects. Using several wheels of this type together, you can multiple the combinations of gobos or animation effects. Cassettes with monochromatic or multicoloured geometric effects can be used on one of the wheels of the rotating gobos. (FR Patent No 1910122)