I think the goal here is a fundamental understanding of how energy works. A closed and isolated system has a certain amount of energy, and nothing can increase the amount of energy in that system. It's like if you put 3 gallons of water in a watertight tank. If you open the tank up again 3 months later there will still be 3 gallons of water. The best way to preserve the amount of energy in a system is to simply not run the system, because once you start the system, there will be entropy (energy unavailable to do work) as things like friction and electrical resistance turn the energy in the system into heat. The longer the system runs, the more entropy increases until finally there is no more energy left to do work and the system stops. The only way to increase the efficiency of the system is to reduce the number of components that cause entropy. That's really all one needs to know to understand that a perpetual machine is impossible by our understanding of physics. You can experiment if you want to, but you might find that you wasted your time.