A lot of origami paper is colored on the front, and white on the back, so you can make patterns by carefully exposing the front and back. I’m vaguely aware of a subdiscipline within origami all about making shapes just with color change. But I have very little experience with it, and don’t understand any of the design principles! As far as I’m concerned, it’s basically magic. Perhaps one day I’ll give a shot at designing something like this.
The instructions for this model are available on CFC.
I feel compelled to mention that I am not a coffee drinker. I drink tea.