I first experimented with motion in the vertical direction and then in the horizontal direction. I decided that I wanted to incorporate both directions. I iterated through a bunch of prototypes and ended up with this:

Top View
Front View

I had quite the difficulty figuring out a way to incorporate both vertical and horizontal motion. The end result wasn’t as exciting as I’d hoped but I was able to incorporate both kinds of motion in some form. With iteration I think this could be better.