Start: Applet not initialized

HI im still learning how to use java, my code doesn't have any errors but it says it's not initialized can some look at it and see what i did wrong

import java.awt.Color;
import java.awt.Graphics;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;

import javax.swing.JPanel;


public class Person extends JPanel implements MouseListener

{
{


this.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) { if (turnsleft > 0)
showNext();
else reset();
}});}


private int turnsleft;


public int getNumLeft() {
return turnsleft;
}

public void reset(){
turnsleft = 6;
repaint();

}

public void showNext(){
turnsleft = turnsleft -1;
repaint();
}


public void init()
{
this.setSize(500, 400);
}

public void paintComponent(Graphics g){
super.paintComponent(g);
this.setBackground(Color.YELLOW);

if (turnsleft < 1)
{
g.setColor(new Color(11, 56, 176));
g.fillOval(250, 70, 40, 40);
}


if (turnsleft <2)
{
g.setColor(Color.BLUE);
g.fillRect(190,100,125,125);
}

if (turnsleft <3)
{
g.setColor(Color.BLUE);
g.fillRect(300,80,80,50);
}

if (turnsleft <4)
{
g.setColor(Color.BLUE);
g.fillRect(125,80,80,50);
}

if (turnsleft <5)
{
g.setColor(Color.BLUE);
g.fillRect(290,220,60,70);
}

if (turnsleft <6)
{
g.setColor(Color.BLUE);
g.fillRect(155,220,60,70);
}

if (turnsleft <7)
{
g.setColor(Color.BLUE);
g.fillRect(120,50,50,50);
}

if (turnsleft <8)
{
g.setColor(Color.BLUE);
g.fillRect(335,50,50,50);
}

if (turnsleft <9)
{
g.setColor(Color.BLUE);
g.fillRect(190,100,125,125);
}

if (turnsleft <10)
{
g.setColor(Color.BLUE);
g.fillRect(150,260,67,30);
}

if (turnsleft <11)
{
g.setColor(Color.BLUE);
g.fillRect(286,260,67,30);
}
}



@Override
public void mouseEntered(MouseEvent e) {
// TODO Auto-generated method stub

}

@Override
public void mouseExited(MouseEvent e) {
// TODO Auto-generated method stub

}

@Override
public void mousePressed(MouseEvent e) {
// TODO Auto-generated method stub

}

@Override
public void mouseReleased(MouseEvent e) {
// TODO Auto-generated method stub

}

@Override
public void mouseClicked(MouseEvent e) {
// TODO Auto-generated method stub

}

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