Make object go across screen and then copy itself infinitely

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


public class Game extends JComponent implements ActionListener {
    Timer t = new Timer(5, this);
    int wx;
    int rx = 10;
    int rx2 = 10;
    int carx = 10;
    int velX = 2;

    public static void main(String[] args) {
        JFrame window = new JFrame("Frogger");
        window.add(new Game());
        window.pack();
        window.setSize(800, 600);
        window.setLocationRelativeTo(null);
        window.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        window.setVisible(true);



    }
    public void actionPerformed(ActionEvent e){
        carx+=velX;
        repaint();
    }

    boolean firstFrame = true;
    @Override
    protected void paintComponent(Graphics g) {

        super.paintComponent(g);
        if (firstFrame) {
            t.start();
            firstFrame = false;
        }
        g.setColor(new Color(173, 216, 230));
        g.fillRect(0, 0, 800, 600); //background
        g.setColor(Color.lightGray);
        g.fillRect(0, 525, 800, 75); //start
        g.fillRect(0, 0, 800, 30); //end
        g.setColor(Color.black);
        g.fillRect(0, 300, 800, 225); //street
        g.setColor(Color.white);

        for (int n = 0; n < 16; n++) {
            g.fillRect(rx, 450, 20, 10);
            rx += 50;
        }
        for (int n = 0; n < 16; n++) {
            g.fillRect(rx2, 375, 20, 10);
            rx2 += 50;
        }
        rx = rx2 = 10;
        while(true){
            g.fillRect(carx, 477, 60, 30);
        }

    }




}