public class TurtleGraphics
{
  public static void main(String[] args)
  {
      World world = new World(300,300);
      Turtle yertle = new Turtle(world);

      yertle.forward();
      yertle.turnLeft();
      yertle.forward();
      yertle.turnLeft();
      yertle.forward(200);
      yertle.turnLeft();
      yertle.forward();
      yertle.turnLeft();
      yertle.forward();

      Turtle t2 = new Turtle(world); // a second Turtle

      t2.turnRight();
      t2.forward(100);
      t2.turnLeft();

      world.show(true);
  }
}