State:       0   |   1   |   2   |   3   |   4   |   5   |   6   |   7   |               |       |       |       |       |       |       |       |       |
--------------------------------------------------------------------------
Level  0 |       |       |       |       |       |       |       |   0   |
--------------------------------------------------------------------------
Level  1 |       |       |       |       |       |       |   0   |       |
--------------------------------------------------------------------------