Total rubbish!
The ONLY way to make a gravity or magnetic perpetual motion machine would be to find a method of shielding gravity or magnetism....i.e a thin sheet of material that magnetism or gravity could not pass through.
No such material can possibly exist..the laws of physics prohibit such.
Made of Unobtanium..................
The Brits invented Cavorite. Known fact......
https://en.wikipedia.org/wiki/First_Men_in_the_Moon_(1964_film) er... documentary
In 1899, Arnold Bedford and his fiancée Katherine Callender – known as Kate – meet an inventor, Joseph Cavor, who has invented Cavorite, a substance that will let anything it is applied to or made of deflect the force of gravity and which he plans to use to travel to the Moon. Cavor has already built a spherical spaceship for this purpose, taking Arnold and (accidentally) Kate with him. While exploring the Moon, Bedford and Cavor fall down a vertical shaft and discover to their amazement an insectoid population, the Selenites, living beneath the surface.