The pen is your mouse pointer. Click and hold to draw. Press the space key to have a different type of paper. Press the C key to clear the paper. Press the up arrow key and type the colour and size numbers in. You can make the numbers as big or as small as you like.
Helpful Numbers: 0 = black 344566788900 = pale yellow 2000 = dark blue 10000 = dark green 24680 = teal 60000000 = light grey 450450450 = orange 09090909090 = pink 900000000 = pale green 565656787878= lavender