mouse down to draw o to change the color to orange b to change the color to blue. once you're done press space and then turn on turbo mode (shift+green flag) to draw a border. This isn't quite finished but I'm going to use it in an upcoming game.
I was having a problem when the lines on the y axis were being drawn where it would draw one line and then keep drawing the same line all the way along the x axis. To solve the problem I made it jump one space each time(hence the gaps) and then fill in the rest, which seems to work. I've changed the script again so the above no longer applies.