- - 1  - - -  1 - -
- 1 1  - - -  1 1 -
1 1 1  - - -  1 1 1

- - -  1 1 1  - - - 
- - -  1 - 1  - - - 
- - -  1 1 1  - - - 

1 1 1  - - -  1 1 1
- 1 1  - - -  1 1 -
- - 1  - - -  1 - -

;; Seems to be easy to generate to this.