16 types of bars with four different shapes (perforated, with slit, angled and triangular) and circles of two different sizes.
Three types of motors: full rotation, limited rotation, interactive motors: Full rotation rotates clockwise with a constant speed when users push the button. Limited rotation rotates to and fro between the angles set by a knob which works as a power switch and a dial. By turning the knob clockwise, the interval increases. Interactive rotates according to the Wifi signal sent from the Sensor unit.