to start drawing you have to press the green flag. press up key to draw a up line. press down key to draw a down line. press right key to draw a right line. press left key to draw a left line. press p to put the pen up. press e to put the pen back down. press e to clear all. press w to make the pen size bigger press s to make the pen size smaller press a to make the pen go forwards through the colour cycle press d to make the pen go backwards through the colour cycle
I've added the change colour effect and I've also added the change pen size block.
