GDSE Question for Czonzhu

        import javax.swing.*;
    import java.awt.*;
    import java.awt.event.*;



    public class TetrisGUI implements ActionListener{
        public static JButton quit = new JButton();
        public static JLabel label1 = new JLabel();
        public static JLabel label2 = new JLabel();
        public static JLabel label3 = new JLabel();
        public static JFrame frame = new JFrame();
        public static MyDrawPanel drawPanel = new MyDrawPanel();
        public static MainAreaPanel mainArea = new MainAreaPanel();
        public static boolean entered = false;


        public static void main(String[] args) {
            TetrisGUI gui = new TetrisGUI();
            gui.go();
        }

        public void go() {

            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            quit = new JButton("QUIT");
            label1 = new JLabel("Level:    1");
            label2 = new JLabel("Lines:    0");
            label3 = new JLabel("Score:    0");
            quit.setFont(new Font("Arial", Font.BOLD, 20));
            label1.setFont(new Font("Arial", Font.BOLD, 20));
            label2.setFont(new Font("Arial", Font.BOLD, 20));
            label3.setFont(new Font("Arial", Font.BOLD, 20));

            MyDrawPanel drawPanel = new MyDrawPanel();

            quit.addActionListener(this);
            mainArea.addMouseListener(new CustomListener(){});



            frame.getContentPane().add(quit);
            frame.getContentPane().add(label1);
            frame.getContentPane().add(label2);
            frame.getContentPane().add(label3);
            frame.getContentPane().add(mainArea);
            frame.getContentPane().add(drawPanel);




            drawPanel.setOpaque(false);//Set the drawPanel opaque
            label1.setSize(100,200);
            label1.setLocation(310,130);
            label2.setSize(100,200);
            label2.setLocation(310,180);
            label3.setSize(100,200);
            label3.setLocation(310,230);
            mainArea.setSize(250,500);
            mainArea.setLocation(20,50);
            quit.setSize(100,40);
            quit.setLocation(300,510);
            frame.setSize(450,600);
            frame.setVisible(true);


        }



        public void actionPerformed(ActionEvent event) {
            System.exit(0);
        }


    }


    class MyDrawPanel extends JPanel {
        public void paintComponent(Graphics g) {
            repaint();
            g.setColor(Color.black);
            g.drawRect(20,50,250,500);//Main Area
            g.drawRect(300,50,100,70);//NextShape
            g.drawRect(145,80,25,25);//Tian Block
            g.drawRect(145,105,25,25);
            g.drawRect(120,80,25,25);
            g.drawRect(120,105,25,25);



            Color deepGreen = new Color(35,165,63);
            g.setColor(deepGreen);
            g.fillRect(121,81,24,24);//Tian Block
            g.fillRect(121,106,24,24);
            g.fillRect(146,81,24,24);
            g.fillRect(146,106,24,24);

            g.setColor(Color.black);
            g.drawRect(245,525,25,25);//Right bottom
            g.drawRect(220,525,25,25);
            g.drawRect(195,525,25,25);
            g.drawRect(170,525,25,25);
            g.drawRect(245,500,25,25);
            g.drawRect(245,475,25,25);
            g.drawRect(220,500,25,25);
            g.drawRect(195,500,25,25);
            Color deepBlue = new Color(11,90,178);
            g.setColor(deepBlue);
            g.fillRect(246,526,24,24);
            g.fillRect(221,526,24,24);
            g.fillRect(246,501,24,24);
            g.fillRect(246,476,24,24);
            Color brightYellow = new Color(255,255,12);
            g.setColor(brightYellow);
            g.fillRect(196,526,24,24);
            g.fillRect(171,526,24,24);
            g.fillRect(196,501,24,24);
            g.fillRect(221,501,24,24);

            //NextShape Blocks
            g.setColor(Color.black);
            g.drawRect(360,60,25,25);
            g.drawRect(335,85,25,25);
            g.drawRect(360,85,25,25);
            g.drawRect(310,85,25,25);
            Color deepRed = new Color(248,0,4);
            g.setColor(deepRed);
            g.fillRect(361,61,24,24);
            g.fillRect(336,86,24,24);
            g.fillRect(361,86,24,24);
            g.fillRect(311,86,24,24);



            //Draw Pause
            if(TetrisGUI.entered == true) {
                g.setColor(deepBlue);
                g.setFont(new Font("Arial", Font.BOLD, 30));
                g.drawString("Pause",100,290);
                g.drawRect(80,260,120,40);

            }
            else{

            }
        }
    }