Electrically-operated moving body travelling on a rail capable of explaining free quadrants described in the mobius theorem

An electrically-controlled ornament travelling on a rail, comprising:

• a rail assembly made of non-conductive material, extending through different directions and defining an endless path in a three-dimensional space, said rail assembly including at least a twisted and turned section and a non-twisted section, a top and a bottom surface on both of which two parallel metal wires extend therethrough and project therefrom, and at least a socket hole from which current is supplied to said metal wires;
• a plurality of supporting means for supporting said rail assembly on a plane and in a desired configuration;
• a moving body having at least two rollers made of permanent magnetic material so that said rollers are magnetically attached to said metal wires on said rail assembly;
• at least one of said rollers being linked to a transmission mechanism, said transmission mechanism being powered by current flowing from said metal wires to said transmission mechanism via said at least one roller to drive said moving body to move or stop on said rail assembly;
• and
• a controller having an extended plug for plugging into said at least one socket hole on said rail assembly to supply power to said metal wires and accordingly said transmission mechanism for driving said moving body to travel, back or stop on said rail assembly under operation of said controller.