Click and drag to make a rectangle. And then another. How 'bout another?
I was playing around on my laptop main screen thingy and making the boxes with my cursor, and it occurred to me that I had seen something like that on Scratch, so I thought, why not give it a shot? So I made this. Feel free to use with credit! 52 blocks Made in like 15 mins 1 list, no variables All by @Koolkoder81 :)