first press the flag, left arrow twice if the screen is not clear, and just move the mouse around to draw! Oh yeah, You have to hold space to draw.... ;--; lmao I recommend fullscreen! I really hope this little piece of creativity gets a bit more popular than my others!!! :DDDDDDD
Just made it lag-free (not really) I mean that i deleted the waait blocks, deleted the repeat one block and instead of glide to mouse i put go to mouse