Watch, and move your mouse to the top of the screen to mess with the settings. (You have to restart for some to change.) Previous versions: https://scratch.mit.edu/projects/660894881/ https://scratch.mit.edu/projects/661509314/ Also check out my other projects! https://scratch.mit.edu/users/BallGamer89/projects/
One of the projects I saw when I first started Scratch looked something like this. I clicked "See Inside" and didn't see any sprites that looked like what was on the screen, and had no idea what was going on. Just in case you're wondering, too... it's done with Scratch's Pen extension. Each time, I run the "Draw" subroutine (created in the "My Blocks" section). It's set to "run without screen refresh," which means it does everything under it without displaying anything else on the screen until it finishes. I use the Pen to draw all the circles.