Rectangles: (5 entries)
  0: Rectangle: x1=0, y1=0, x2=0, y2=0
  1: Rectangle: x1=235, y1=253, x2=273, y2=266
  2: Rectangle: x1=305, y1=320, x2=355, y2=337
  3: Rectangle: x1=375, y1=393, x2=437, y2=415
  4: Rectangle: x1=423, y1=451, x2=492, y2=475