Rectangles: (5 entries)
  0: Rectangle: x1=0, y1=0, x2=0, y2=0
  1: Rectangle: x1=141, y1=267, x2=151, y2=280
  2: Rectangle: x1=181, y1=340, x2=195, y2=357
  3: Rectangle: x1=221, y1=417, x2=241, y2=439
  4: Rectangle: x1=251, y1=478, x2=271, y2=502