public void update() {
                 scene.detach();
         
                 Scene scene2 = new Scene ();
                 scene2.setCapability(BranchGroup.ALLOW_DETACH);
                 addKbdNavig (universe, scene2);
                 scene2.compile();
                 
                 scene = scene2;
                 universe.addBranchGraph (scene);
 }