Click the dot and drag it to make a line. Up arrow to change your color and space to change your backdrop! Down arrow to clear your art so far! It doesn't always go where it should in perspective to another line you just made, but it is a work in progress!
Thanks to cs1637822 for the idea to do a graffiti project! I figured out how to use pen from a youtube video. Fell free to use the code/remix, just credit me!