@Override
			public void run() {
				try {
					UIManager.setLookAndFeel(UIManager
							.getSystemLookAndFeelClassName());
				} catch (ClassNotFoundException | InstantiationException
						| IllegalAccessException
						| UnsupportedLookAndFeelException ex) {
				}
				PuzzleGui window = new PuzzleGui();
				window.getFrameSlidingPuzzle().setVisible(true);
				window.getFrameSlidingPuzzle().setLocationRelativeTo(null);
				window.createDialog();
			}