This one's pretty interesting... It picks a random point and adds a cross ( + symbol) there. Both the vertical and horizontal lines have a length of 51 px (25 on either side of the selected point, plus the center). The entire shape is the color of its center. Nothing too complicated, but still quite cool!
Oh, yeah. Be sure to use turbo mode. (Shift + click green flag) Thanks to @Layzej for the image!
