Having trouble with drawing a Car with TurtleGraphics

Question

hey guys
i need help on a program that should draw a car, erase it, and draw it again but in a different spot on the window. Now I have all of this except when the car is drawn again the wheels aren't moved with the car.
Heres the main:
import TurtleGraphics.StandardPen;
import java.awt.Color;
import TerminalIO.KeyboardReader;
public class TestCar
public static void main(String[] args)
  KeyboardReader reader = new KeyboardReader();
  Car firstCar = new Car();
  firstCar.drawCar();
  reader.pause();
  firstCar.eraseCar();
  reader.pause();
  Car secondCar = new Car(100, 100);
    secondCar.drawCar();
} Here is the class:
  import TurtleGraphics.StandardPen;
import java.awt.Color;
public class Car {
private StandardPen pen;
private double xPosition, yPosition;
public Car ()
   xPosition = 0;
   yPosition = 0;
   pen = new StandardPen();
   pen.setColor(Color.red);
public Car(double x, double y)
   this();
   xPosition = x;
   yPosition = y;
public void drawCar()
    drawRectangle (-150,75, 300, 150);
    drawRectangle (-50, 125, 100, 50);
    drawCircle (124, -230, 40);
    drawCircle (-124, -230, 40);
  public void drawRectangle (double x, double y, double length, double width)
    pen.up();
    pen.move(x + xPosition, y + yPosition);
    pen.down();
    pen.setDirection(270);
    pen.move(width);
    pen.turn(90);
    pen.move(length);
    pen.turn(90);
    pen.move(width);
    pen.turn(90);
    pen.move(length);
  public void drawCircle(double x, double y, double radius)
   double side = 2.0 * Math.PI * radius / 120.0;
   pen.up();
   pen.move((xPosition + x + radius), ((yPosition + y) - side)/ 2.0);
   pen.setDirection(90);
   pen.down();
    for(int i = 0; i< 120; i++) 
     pen.move(side);
     pen.turn(3);
public void eraseCar()
    pen.setColor(Color.white);
    drawCar();
    pen.setColor(Color.red);
} Also the car is supposed to move across the screen once drawn the second time but i haven't figured that out yet. Maybe with a thread:
public void oneSec()
   try
   Thread.currentThread().sleep(1000);
   catch (InterruptedException e)
     e.printStackTrace();
   }  If anyone can help it'd help alot thanks

Answer 1

i fixed the part about the wheels now but im stuck on how to make the car move on the turtleGraphics window once it is drawn the second time.
Would this thread help it at all?
public void oneSec()
   try
   Thread.currentThread().sleep(1000);
   catch (InterruptedException e)
     e.printStackTrace();
  }