Try Turbo Mode! Official Studio: https://scratch.mit.edu/studios/2957771/
I swear this follows all the rules, but it uses a 172000-digit number in a "letter _ of _" block and your flash could easily crash if you look inside. Credit to @Layzej for the original image data Here's the forum topic for NPR: https://scratch.mit.edu/discuss/topic/140162/ I got the idea to use decimal positions from here: https://github.com/LLK/scratch-flash/issues/1174#issuecomment-236040887
