This is my second project involving the pen extension. Use the mouse to draw on the board! Press [c] key to select colors and press space to clear all. I will eventually find out how to make an eraser that only erases where you tell it to, if you have ideas on how to do that then please feel free to say so in the comments. You can have a bit of fun by holding [n] key and also pushing the mouse (This scribbles all over the board, so please do not do this if you are very fond of your drawing!)
All coding by me.