mouse down to draw, and space to erase This is NOT my entry to a contest, I just simply improved on something with 14 used blocks
Note: this doesn't add anything from the original "Sketch book", however, the original would have been disqualified due to it being 2 sprites, even if you can only see 1. also, it's important to note that you should use the pen down block instead of the stamp block (THE IF-ELSE BLOCK WAS RIGHT UNDER THE IF BLOCK). The only excuse you could have made for two sprites is to make the thumbnail, however, after making it you can immediately delete the sprite again.