Some airplanes have propellers. Some have one. Some have two. Some have
Alter and extend the sample project in the following ways:
- Change the number of propellers from two to four.
- You may have to make the size of the propellers a little smaller.
- Add code to make the airplane move up and down. Control this movement
using the up arrow and down arrow keys.
- Create a button which starts and stops the propellers.