I finally decided what I was going to do. I don’t know exactly what my goal is, but I have a pretty good idea. I already know almost all of the steps and my sketch is almost done.

The first step is that I press the button. That causes the car to go around the track. Then the car hits the cup, which makes the ball fall out. Then the ball hits 2 small balls. Then each ball hits a domino, which hits more dominoes. Each path of dominoes leads to a different step.