Осевые трансформации, три изображения

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.geom.AffineTransform;
import javax.swing.*;
 
 
public class Main extends JFrame {
  
  private Image car, wheel1, wheel2;
  private java.net.URL imgURL; 
  private AffineTransform carTr, wheel1Tr, wheel2Tr = new AffineTransform();
  private Graphics2D g2d;
  private int first, step = 0;
  private Graphics g;
  private MediaTracker mt;
  private JLayeredPane lPane;
  
  public Main() {
    super("Ehat");
    Dimension dim = Toolkit.getDefaultToolkit().getScreenSize();
 
    Panel panel = new Panel();
    Container content = this.getContentPane();
    content.setLayout(new BorderLayout());
    JButton b1 = new JButton("EHat");
    panel.add(b1);
    b1.addActionListener((new ActionListener() {
      public void actionPerformed(ActionEvent e) {
               action();
        }
     }));
    content.add(panel,BorderLayout.SOUTH);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setSize(800, 600);
    int x = (dim.width-this.getSize().width)/2;
    int y = (dim.height-this.getSize().height)/2;
    this.setLocation(x, y);
    this.setResizable(false);
    loadImages();
  }
  
  private void loadImages () {
    imgURL = getClass().getResource("antram_uzdavinukui.JPG");
    car = this.getToolkit().getImage(imgURL);
    imgURL = getClass().getResource("ratas.JPG");
    wheel1 = this.getToolkit().getImage(imgURL);
    wheel2 = this.getToolkit().getImage(imgURL);
    mt = new MediaTracker(this);
    mt.addImage(car , 0);
    mt.addImage(wheel1 , 0);
    mt.addImage(wheel2 , 0);
    try {
      mt.waitForAll();
    }
    catch (InterruptedException ex) {}
 
  }
 
  public void paint (Graphics g) {
   try {
       g2d = (Graphics2D) g;
    if (first < 1) {
      firstPaint(g2d);
    }
    else ride(g2d);
   } catch (Exception e) {
    }
  }
  
  private void firstPaint(Graphics g) {
      g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
      g2d.setBackground(Color.WHITE);
      g2d.drawImage(car, new AffineTransform(), this);
      g2d.drawImage(wheel1, 115, 353, this);
      g2d.drawImage(wheel2, 235, 353, this);
  }
 
  public void action () {
    first++;
    step++;
    repaint();
  }
  
  public void ride (Graphics g) {
    System.out.println("RIIIDE:(");
    carTr.translate(5, 0);
    g2d.drawImage(car, carTr, this);
  }
  public static void main(String args[]) {
    new Main().show();
  }
 
}