Go see the "Write _ font size _ x _ y _" block inside and write what you want! It works even while the script is runing!
This is not perfect for a text engine but whatever. It's work in progress. All credit goes to me. If you use this, don't forget to give credit! And if you do, I would like to see what you did with my project. It's fun to see what my stuff is used for! =) Check out the new (and way better) version! https://scratch.mit.edu/projects/120745979/