Instructions are on the page. :) After you click the check mark, you can hit space to change the background color! This is a project I made a few years ago, but now I improved it. You can click the check mark to see your finished pizza. Also, to bring a topping to the front of the pizza just click on it. Have fun! Why are you down here? Anyway, here's a secret: once you have clicked the check mark, press the up arrow to change the background to rainbow circles!
Hi! Credit to other people who made pizza projects :] (but I didn't copy)