0 0 x x
                  50 0 0 0
                5000 1 0 0
                5050 1 1 1
               10000 0 1 1
               10050 0 0 0
               15000 1 0 0
               15050 1 1 1
               20000 0 1 1
               20050 0 0 0
               25000 1 0 0
               25050 1 1 1
               30000 0 1 1
               30050 0 0 0
               35000 1 0 0
               35050 1 1 1
               40000 0 1 1
               40050 0 0 0
               45000 1 0 0
               45050 1 1 1
               50000 0 1 1