MyPoint p1, p2, p3, p4; //define four points
  MySegment[] segment = new MySegment[2]; //define two segments
  MyShape shape; //define a shape
  //initialize variables
  void setup(){
    p1 = new MyPoint(10., 10.); //make a point
    p2 = new MyPoint(20., 20.); //make a point
    p3 = new MyPoint(20., 20.); //make a point
    p4 = new MyPoint(30., 10.); //make a point
    segment [0] = new MySegment(p1, p2); //make a segment
    segment [1] = new MySegment(p3, p4); //make a segment
    shape = new MyShape(2, segment); //make a shape
    shape.move(30., 35.); //move the shape at (30.0,35.0)
    shape.plot(); //draw the shape
  }