Could this be the answer to the worlds green energy problems?

I stuck small strong magnets to a cardboard wheel and used a pencil as an axle .I then put fixed magnets on card at each side of the wheel,placed to repel these magnets.The wheel spun so fast everything fell apart.Although I have tried to replicate this experiment I have failed.I do not have the recourse's or expertise to progress but if I can do this why can,t scientists.The end result would be a cost free motor.