import Media.*;

public class test1{

private TurtleDisplayer display;

private Turtle yertle;

public test1(){

TurtleDisplayer display = new TurtleDisplayer();

Turtle yertle = new Turtle();

display.placeTurtle(yertle);

drawLine();

display.close();

}

private drawLine(){

yertle.moveTo(60,60);

}

public static void main(String[] args){new test1();}

}

This program generates a null pointer exception at yertle.moveTo(60,60); Why is this happening? Whatmust I do to fix it?