HOW TO RING A CUBE
Draw a torus on every face of a cube. The tori meet along the edges of the cube. Clamp these joints with a smalled turus perpendicular to the edge of the cube. Method 1: Determine the place and orientation of the
tori one by one, then combine the tori.
Method 2: Draw two tori. Construct a module which can be regared as one face of the cube, and produce the faces of the cube.
