<:> Exercises
- Look at the documentation for the Color class. Then modify the applet
so that it uses one of the other colors predefined by this class.
- Modify the applet so that clicking in the bottom, right corner causes
the Java `beep' method to be called: Toolkit.getDefaultToolkit().beep();
- Add a MouseMotionListener to the applet and modify the code so that
you can drag the blob of color around with the mouse.