Just drag the points. Every grid mark is 20 pixels. Use the arrow keys to change the shape. Mobile version: : https://scratch.mit.edu/projects/746739785/
I got the inspiration from my Geometry math class. ⚠️ Warning ⚠️ I report all rude or advertising comments. I also report all remixes that are not changed at all from the original project. It's a surprising amount of people, actually.