When viewing the project page (in regular or full-screen mode), click and drag your mouse to draw on the stage with stamped versions of the sprite. Press the space key to erase all. Press the right arrow to change costumes.
Remix! I added a few things. The 'Hide' sprite is for when you'd like to take a picture, all of the sprites disappear except for the 'Show' sprite that allows the other sprites to reappear.
