To start, type a number to specify how fast you want the pen to move in the direction of your choice. For 1-9, type the number to get the corresponding speed. Type 0 if you want a speed of 10, the fastest available. You have to enter a speed to start, but you can change it at any time through the same operations. Once you have chosen a speed, use WASD or arrow keys to move the pen. If you want to clear your drawing press the green button. If you want to move someplace else without drawing press u while you move to that place.
I got inspired from a creation made by @talonnails.
