Eternal engine

I remember when studying the last years of high school  Professor of Physics (of happy memory), we showed that it was impossible perpetual motion by a machine without using some form of energy (electricity, steam, wind, etc.)

  I walking and watching some videos Youtube, I found one that teaches how to build a perpetual motion machine with a few magnets.

It is very close to the perpetual machine, using the attraction and repulsion of the magnets. 

I suggest you go to the video that is in Spanish, but their images are perfectly understandable:

https://www.youtube.com/watch?v=NMHOiIfxZ1g