The solution of non-linear- The Mobius ring

Mobius ring is a famous mathematic object which is famous for its special features.

You can draw a straight line along with the edge of the paper and it can finally end up with the starting point. 

It is a paper with just one side.

As i am working on "Rocket man", i think mobius ring will fit to the theme. On one hand, the story mostly happens in the universe which is relative to infinity and mobius ring is a symbol of infinity to ome extent. On the other hand, to describe the life of rocket man, which is boredly repetitive, mobius ring fit to the concept too. As far as i am understand, the song describes a man in the future is working as a "rocket man", the job that probably is not special any more.