Click each feature (background, the color of the rock, hat, eyes, nose, and mouth) to change it. Click done when you're done to stop all, and then screenshot it and frame it or something, idk. *some of the features that are just lines are a bit hard to click, be careful. You may accidentally change the color, but you can put it back by just clicking through again..
I like rocks. You can make one that looks suspiciously like Barry B. Benson from that Bee Movie, lol. Or Voldemort. Not planned!