Here is an example of a basic hollow (doughnut) code drawn wheel which spins to a stop with the prize won alerted to the user.
The point of this example is to show how with a hollow wheel you can put text or other visual elements on the background image and it will show in the middle of the wheel and stay stationary when the wheel spins.
Choose a power setting then press the Spin button. You will be alerted to the prize won when the spinning stops.