A color electrophotographic image forming apparatus which simplifies a configuration in which a rotary is rotated to change over respective developing devices to a development position to reduce the costs and save the space, and which simplifies the changeover operation to reduce an operating time. The method includes forming at least one Micro-Electro-Mechanical System cavity. Odds are paid out in this manner until the available wagering pool is exhausted, at which time any surplus remaining in the available wagering pool may be distributed. The respective transmission elements are in communication with each other and with a transmission network integrated into the drill string.