Link: https://www.openprocessing.org/sketch/592667

This portrait is of my guinea pig, Percy. When you move the mouse to where his butt is, his eyes turn white and he poops. This is because in real life, when you touch his butt, he gets really stressed out and you can see the whites of his eyes. Also, when he gets scared, he poops a lot. I encountered a few problems when making this. First, I had trouble making the poop appear and disappear, so I just made the poop white, and when the mouse was moved to where his butt is, the poop would turn black to give the illusion of it appearing. Other than this, everything turned out okay.