Click the green flag to start. You will see an 8 part pinwheel being drawn. You don't have to press any keys while this is happening.
I made this project by using the "Learn to Program with Scratch" book. I first had to download the file " Ch. 5 Pinwheel no code.sb2." I had to then make 2 blocks and create a variable named "sideLengh." Then I made scripts following the book and created the 8 part pinwheel.