Click the Green Flag, then select one of the modes: Manual - The rocket follows the cursor. Use the "C" key to turn the paint flow on and off. Auto - The rocket shuttles around the screen on its own. Use the "C" key to turn the paint flow on and off. Move the mouse around as you paint to alter the shade and achieve interesting effects! TIP: Quickly jiggling the mouse or circling it around the center of the stage while holding down "C" producescc some nice color effects in the paint trail!