Rectangles: (5 entries)
  0: Rectangle: x1=0, y1=0, x2=0, y2=0
  1: Rectangle: x1=40, y1=16, x2=160, y2=194
  2: Rectangle: x1=51, y1=34, x2=202, y2=222
  3: Rectangle: x1=63, y1=42, x2=249, y2=273
  4: Rectangle: x1=71, y1=40, x2=280, y2=300