The generation system really makes this seem cool. Use Shift-Green Flag to get the final result quickly. Don't if you want to see the process. Sneak Peak #1 here: https://scratch.mit.edu/projects/1168830158/
All notes and credits are in the first one. You might notice that not all the squares are filled. That's because the system keep remaking the boxes over and over, and the ones that overlap get deleted. The chances of all the squares being filled are near impossible. Even though this was all unintentional, it will be cool in the game. Comment how many squares aren't filled in your generation!