Wait 4 seconds for the thumbnail to disappear. Click to draw. Space to erase all. Up arrow to stop drawing. Click to resume. E to use the eraser tool. Change the pen size by dragging the pen size variable. Space to change the backdrop.
Look at this: https://scratch.mit.edu/projects/511355604/ Thanks to @dodo7y7 for some of the code. Please Heart, Star, and Remix this project. Please follow @monopoly57. Full screen recommend.