building a house but having problems connecting it

import Guzdial.*;

/**

* Course: ....

* Section: .....

* Professor: ......

* Name: .....

* Assignment #: ......

*/

public class House

{

static World earth;

static Turtle turtle;

static void house()

//It builds a house

{

earth = new World();

turtle = new Turtle(earth);

rectangle(100,100); //Draws a rectangle of 200 x 100

equilateral (100); //Draws equilateral triangle of 100 on each side

}

//Draws four sides of a rectangle of a given width and height

static void rectangle(int width, int height)

{

turtle.forward(height);

turtle.turnRight();

turtle.forward(width);

turtle.turnRight();

turtle.forward(height);

turtle.turnRight();

turtle.forward(width);

turtle.turnRight();

}

//Draws three sides of a equilateral triangle of a given length

static void equilateral(int length)

{

turtle.forward(100);

turtle.penUp();

turtle.forward(100);

turtle.turn(72);

turtle.penDown();

turtle.penUp();

turtle.forward(100);

turtle.turn(72);

turtle.penDown();

turtle.penUp();

turtle.forward(100);

turtle.turn(72);

turtle.penDown();

turtle.penUp();

turtle.forward(100);

turtle.turn(54);

turtle.penDown();

turtle.turn(120);

turtle.forward (100);

turtle.turn(120);

turtle.forward(100);

}

}