// SquarePattern2.java
import ch.aplu.turtle.*;

class SquarePattern2 extends Turtle
{
  SquarePattern2()
  {
    hideTurtle();
    speed(-1);
    figure(0, 0, 64);
  }

  void figure(double x, double y, int s)
  {
    if (s < 1)
    {
      return;
    }
    setPos(x - s/2, y - s/2);
    square(s);
    figure(x + s, y + s, s/2);
    figure(x - s, y + s, s/2);
  }

  void square(int s)
  {
    for(int i = 0; i < 4; i++)
    {
      forward(s);
      right(90);
    }
  }

  public static void main(String[] args)
  {
    new SquarePattern2();
  }
}