and 10 there are two basic approaches to the task of generating illumination sequences the most simple one of them in terms of the structural and functional complexity of the serial to parallel converter is that each command given by the microprocessor through the serial connection to the serial to parallel converter represents exactly one illumination pattern in order to realize an animation effect which is a sequence of successive illumination patterns the microprocessor sends successive commands to the serial to parallel converters the other alternative is that a single command means a complete sequence of illumination patterns according to the latter approach when the serial to parallel converter receives a command from the microprocessor through the serial connection it checks whether the command means a single pattern or a sequence if it means a sequence it reads the patterns constituting the sequence from a memory and gives the control signals to the light sources or light source switch entities so that the patterns are produced one at a time the pace of changing from one pattern to another in the sequence needs to be determined in relation to a certain clocking signal the serial to parallel converter may have a clock signal generator of its own to produce the clock signal or it may receive a clock signal from some other parts of the electronic device regardless of whether the.