Click the "see inside" button that you find above this text. ^ This tutorial is made of script examples and comments. l Hope this helped! Please suggest things to add in the comments. You should understand the basic concept of pen before using this tutorial. Otherwise you can click the link below l The simple explanation of the pen feature is helpful v Links: Simple explanation of pen: https://scratch.mit.edu/projects/37103/ Sin and cos explanation: https://scratch.mit.edu/projects/11488107/ Squarotate - Pen Runner: https://scratch.mit.edu/projects/92410247/