Did you ever play "Pin the Tail on the Donkey"? It was a common game at birthday parties when I was in grade school. It was also the first thing I thought of upon seeing this prompt for the "Fill in the Blank" theme of this week's Scribble Picnic. (You can see at least a dozen other takes on the theme here.)
I just did a couple of initial sketches along the "Pin the Tail on the Donkey" line of thinking.
They didn't go any further, so instead I went with several dozen "pins" and multiple colors to come up with this.
Though at this point I prefer to stick with paper and pencil, I think this would have worked well for me to try on a computer program. Will I ever? We'll see!