The redraw button is to create a shape, by toying with the settings (a, size, and n) Pen size is made by slider on the bottom. Clear is clear all of the board, and the color boxes are color. MAKE SURE TO SWITCH PEN SIZE TO 1 EVERY TIME YOU SWITCH A COLOR!
Made this one by myself. PS: If anyone wants to save your drawing, go inside, (Big blue button) and right click on the stage, not the sprites, and click save picture of stage. Then, transfer the picture to wherever you want to in your computer. Also, here's a example that I drew: https://scratch.mit.edu/projects/131904775/