Click the green flag and watch the graphic effect. Click the stage to switch to the next effect. Click the switch to change the backdrop color.
All the effects are made by stamping a costume consisting of a red radial gradient. By changing properties such as color, transparency, position and size, and other things like how many times to stamp each frame, a wide range of effects can be created. After stamping the radial gradients - before each screen refresh - a 99% transparent white or black screen is stamped on top of it, making the old stamps fade out. All by me.
