Press the flag to start. Draw anything you want. To start over, press the space bar. ATTENTION EVERYONE: To change the size of the scratcher, use the left and right arrows. (People have been pointing out that sometimes the scratcher will change sizes even though they didn't press anything. I just realized that apparently when you use the mousepad to zoom in and out, it activates the up and down keys on scratch. So I switched it to the left and right. Hopefully there are no more issues with that.) Enjoy
a comment on the original project said something about an undo-button. i wanted to add it. and (in the original project)when you draw very fast, it draw long lines with the same color. if you do that here, it still draw long lines, but they will be rainbow too. also shortened the code a bit what also made the rainbow smoother
