Fiddle around with the variables to make all kinds of different artsy spirals! Press the down arrow to hide the ball clones, and the up arrow to show them again. Press space to clear the screen. The possibilities are endless! Try: Angle: 7, Speed: 2, Pen Size: 1 Angle: 10, Speed: 2, Pen Size: 21 Angle: 100, Speed: 9, Pen Size: 100 Angle: 90, Speed: 1, Pen Size: 16
Thanks to the book called Coding Projects in Scratch for the tutorial on how to do this.