Solution to Coloring a Donut

See the original problem

Solution (Spoiler alert!)

Graphics are made with Mathematica. Some of the map is hidden, since it's 3-D, but you may assume that nothing unusual is going on in the back.

If you thought that the donut was too easy, you should try creating a map on a mobius strip that requires at least six colors.

Mobius solution (Spoiler alert!)