public static void main( String args[] )
   {
       Robot r2d2 = new Robot();
       r2d2.moveRight( 20 );
       r2d2.moveDown( 10 );
       r2d2.moveLeft( 3 );
       System.out.println( "r2d2 coordinates: "+r2d2.getX()+","+r2d2.getY());
       r2d2.moveUp( 5 );
       r2d2.moveRight( 5 );
       System.out.println( "r2d2 coordinates: "+r2d2.getX()+","+r2d2.getY());
   }