If you want to control the shape that will be made click "You Choose". If you want to get to the point and have the computer choose click "Computer Chooses". Some shapes are boring, nothing to stop that. Just try again by pressing the back button. Enjoy and be impressed. Feel free to add to any math studios you curate!
Music: Mp3 version https://www.youtube.com/watch?v=p13yZAjhU0M