public class RobotOwner 
{
   private Robot harry;

   public RobotOwner()
   {
      // creating harry

      // first, we create new wheels for harry
      Stepper wheels = new Wheels();

      // then, we create a new Robot using the new wheels, 
      // and the color pink, and refer to it as harry
      harry = new Robot( wheels, java.awt.Color.pink );

      // switch him on.
      harry.switchOn();

      // Oh, I'm bored.  Sleep for a while.
      try {
         Thread.sleep( 30*60*1000 );  // sleep for 30 minutes.
      } catch ( InterruptedException e ) {
         System.out.println( "Hey! Who woke me up?!!" );
      }

      // oops! I forgot to turn harry off before I slept!
      // better do it now.

      harry.switchOff();
   }
}