Just watch!
This was made with Wick Editor. These characters are based on the set of characters on the Cursive Hebrew Wikipedia page https://en.m.wikipedia.org/wiki/Cursive_Hebrew, but other sources may vary a surprising amount, since it's literally "handwriting." If it's laggy, that's because of Scratch-related constraints, and not low quality frames, or low FPS. Here's a Hebrew Print version: https://scratch.mit.edu/projects/1149285989/.