frame=new JFrame ("Mechanical Engineering- Quiz");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        d=Toolkit.getDefaultToolkit().getScreenSize();
        frame.setSize(1380, 725);

        panel=new JPanel();
        panel.setLayout(new BoxLayout(panel,BoxLayout.PAGE_AXIS));
        panel.setBackground(Color.LIGHT_GRAY);
        frame.add(panel);