There is a Mobius strip in the space with rolling toruses on its surface. You can switch the camera to either birds view or near view by tapping the screen. In near view you can move the camera to the side by swiping horizontally.

This project is a ported version of Computer Graphics homework at Budapest University of Technology and Economics.
http://cg.iit.bme.hu/portal/szamitogepes-grafika