Turn on turbo mode (shift-click the green flag) and then click the green flag and watch. Adjust the sliders if you like. Try setting both the lower ones to 90 for example.
Instead of @PIGofDOOM's resize and stamp method, I implemented a "squiggly color pencil lines" method. I also made a version of this where you could draw your own shape and have it filled, using the "if touching color" sensing block. But that turned out to be extremely slow, so I scrapped it.
