0.0  0.0
  4.0  0.0
  8.0  0.0
  2.0  2.0
  0.0  4.0
  4.0  4.0
  8.0  4.0
  3.0  5.0
  1.0  7.0
  0.0  8.0
  4.0  8.0
  8.0  8.0