instuctions~ turn the pen on/off with the pen on/off buttons, mouse down=pen down erase by clicking on the eraser and dragging it. also click the fill on button to turn on the fill tool, to use it click on a color and press space bar to fill with a color. as you can probably tell, click a color to change the pen color. if "pen on" has a zero, it means off, ond 1 means on.(like in binary) PS I have NO CLUE how I know this, but... here is the number 17 in binary: 10001 here is how it works, the first column is 1s so 1 1s and the next column is 2s none of them and there can't be more than 2 in each, so no 4s or 8s but there is one 16 so 1 for the 5th column. 1+16=17.
