Rectangles: (5 entries)
  0: Rectangle: x1=0, y1=0, x2=0, y2=0
  1: Rectangle: x1=321, y1=330, x2=337, y2=332
  2: Rectangle: x1=418, y1=420, x2=436, y2=423
  3: Rectangle: x1=515, y1=516, x2=538, y2=520
  4: Rectangle: x1=579, y1=583, x2=605, y2=588