图形第一次完美运行，但框架冻结第二次或第三次

Question

所以我正在制作这款游戏​​，让你记住一个模式并重新创建它。图形第一次运行良好，但第二次运行不正常。我尝试使用Swing Timer但它对我不起作用（也许我没有正确使用它，无论我还需要帮助）

public static void main(String args[]) {
    frame.getContentPane().setBackground(new Color(255, 218, 185));
    frame.setBounds(100, 100, 400, 600);
    frame.setResizable(false);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.getContentPane().setLayout(null);

    Counter = 0;
    //
    JButton btnScore = new JButton("Time Left: ");
    btnScore.setHorizontalAlignment(SwingConstants.LEFT);
    btnScore.setFont(new Font("Tahoma", Font.PLAIN, 26));
    //
    btnScore.setBounds(86, 113, 207, 73);
    frame.getContentPane().add(btnScore);
    //
    JButton btnHighScore = new JButton("High Score: ");
    btnHighScore.setHorizontalAlignment(SwingConstants.LEFT);
    btnHighScore.setFont(new Font("Tahoma", Font.PLAIN, 16));
    btnHighScore.setBounds(86, 455, 207, 50);
    frame.getContentPane().add(btnHighScore);
    //

    Scorebutton.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {

        }
    });
    //
    Scorebutton.setHorizontalAlignment(SwingConstants.LEFT);
    Scorebutton.setFont(new Font("Tahoma", Font.PLAIN, 16));
    Scorebutton.setBounds(86, 398, 207, 50);
    frame.getContentPane().add(Scorebutton);
    //
    A.setBackground(Color.GRAY);
    A.setContentAreaFilled(false);
    A.setOpaque(true);
    //
    A.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            if (code[Counter] == 1) {

                Score++;

            } else {
                End();
            }
            Counter++;
            if (Counter == Size) {
                Size++;
                n++;
                frame.setVisible(true);
                main(args);
            }
        }
    });
    A.setBounds(86, 187, 89, 73);
    frame.getContentPane().add(A);
    //
    B.setBackground(Color.GRAY);
    B.setContentAreaFilled(false);
    B.setOpaque(true);
    B.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent arg0) {
            if (code[Counter] == 2) {

                Score++;
            } else {
                End();
            }
            Counter++;
            if (Counter == Size) {
                Size++;
                n++;
                frame.setVisible(true);
                main(args);
            }
        }
    });
    //
    B.setBounds(204, 187, 89, 73);
    frame.getContentPane().add(B);
    //
    C.setBackground(Color.GRAY);
    C.setContentAreaFilled(false);
    C.setOpaque(true);
    C.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent arg0) {
            if (code[Counter] == 3) {

                Score++;
            } else {
                End();
            }
            Counter++;
            if (Counter == Size) {
                Size++;
                n++;
                frame.setVisible(true);
                main(args);
            }
        }
    });
    //

    C.setBounds(86, 286, 89, 73);
    frame.getContentPane().add(C);
    //
    D.setBackground(Color.GRAY);
    D.setContentAreaFilled(false);
    D.setOpaque(true);
    D.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent arg0) {
            if (code[Counter] == 4) {

                Score++;

            } else {
                End();
            }
            Counter++;

        }
    });
    //
    D.setBounds(204, 286, 89, 73);
    frame.getContentPane().add(D);
    //
    frame.setVisible(true);
    //

    try {

        generate();
    } catch (InterruptedException e1) {
    }
}

public static void generate() throws InterruptedException {

    Counter = 0;

    rn = new Random();
    while (Counter != Size) {
        int Number = rn.nextInt(4) + 1;
        code[Counter] = (Number);
        Counter++;
    }
    Counter = 0;
    while (Counter != Size) {
        System.out.println(code[Counter]);
        Counter++;
    }
    Counter = 0;
    Show();

}
public static int x = 0, z = 0;

public static void Show() throws InterruptedException {

    timer1 = new Timer(250, new ActionListener() {// Timer 4 seconds
        public void actionPerformed(ActionEvent e) {
            if (Counter == Size) {
                Size++;
                n++;
                frame.setVisible(true);
                main(null);
            }

        }

    });
    if (Size != Counter) {

        Go();

    }
    if (Size == Counter) {

        Counter = 0;
        timer1.start();
    }

}`public static void Go() throws InterruptedException {
    if (code[Counter] == 1) {
        System.out.println("worked");
        Thread.sleep(500);

        A.setBackground(Color.RED);
        Thread.sleep(500);

        A.setBackground(Color.GRAY);
        Counter++;

    }
    if (code[Counter] == 2) {
        System.out.println("worked");
        Thread.sleep(500);

        B.setBackground(Color.RED);
        Thread.sleep(500);

        B.setBackground(Color.GRAY);
        Counter++;
    }
    if (code[Counter] == 3) {
        System.out.println("worked");

        Thread.sleep(500);
        C.setBackground(Color.RED);
        Thread.sleep(500);
        C.setBackground(Color.GRAY);
        Counter++;
    }
    if (code[Counter] == 4) {
        System.out.println("worked");

        Thread.sleep(500);
        D.setBackground(Color.RED);
        Thread.sleep(500);
        D.setBackground(Color.GRAY);

        Counter++;
    }
    Show();
}`