createCanvas(windowWidth,

               windowWidth);

  pen = new Pen(0,0);

  background("orange");

  stroke("blue");

  strokeWeight(10);

  pen.moveForward(75);

  pen.turnRight(90);

  pen.moveForward(75);

  pen.turnLeft(90);

  pen.moveForward(75);

  pen.turnRight(90);

  pen.moveForward(75);

  pen.turnLeft(90);

  pen.moveForward(75);

  pen.turnRight(90);

  pen.moveForward(75);

  pen.turnLeft(90);

  pen.moveForward(75);

​

}