p1 = Point(10, 8)
    p2 = Point(50, 20)
    print('p1: Should print  Point(10, 8):', p1)
    print('p2: Should print  Point(50, 20):', p2)

    p1.move_to(5, -1)
    p2.move_to(0, 0)
    print('p1: Should now print  Point(5, -1):', p1)
    print('p2: Should now print  Point(0, 0):', p2)

    p2.y = 99
    print('p1: Should still print  Point(5, -1):', p1)
    print('p2: Should now print  Point(0, 99):', p2)

    p2.move_to(0, 222)
    print('p1: Should still print  Point(5, -1):', p1)
    print('p2: Should now print  Point(0, 222):', p2)