Position the handles and press the space bar! (You can't move the handles while it's drawing)
I just came across an awesome explanation of how bezier curves work and felt like making it in Scratch! How it works: You'll notice different colored dots and lines. The three green dots move along the handles and between the tops of the handles. There are lines drawn between them. The blue dots move along the green lines and have a line drawn between them. Finally, the purple dot moves along the blue line and draws the bezier curve. That's it!
