[layer]

NNNNKr
...RKr
...RKr
...RKr
...RKr
...RKr
NNNNKr
^

[layer]

NNKr
.RKr
.RKr
.RKr
.RKr
.RKr
NNKr


[layer]

Kr
Kr
Kr
Kr
Kr
Kr
Kr
