Input the iterations and pen length then see the output. If you want to watch it generate, you can go inside, right-click the "Render Dragon Fractal" block, click "Option", then click the box next to "run without screen refresh". Then just click "Ok" then start the project again, and it won't instantly generate. It's really cool watching it generate and almost cross over itself, always filling up every gap.
Code: Me Graphics: MIT for the input box (duh) If you want to see my other dragon fractal generator, click this link: https://scratch.mit.edu/projects/100867124/