replacing value of 2D array

I doing the task where i have 2D array filled with '.' and after pressing n on keybord code have to be replaced with code below. I don't know how to do this and will be grateful for any help.

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 array now:               after pressing n:
       ............               ...1.......1
       ............               .0......1...
       ............               .....0......
       ............               .0.1.0.0.0.0
       ............               1.1....0..1.
       ............               .....0..1...
       ............               ..11....1...
       ............               0.....0....0
       ............               .1..1.....1.
       ............               ..0..0.0....
       ............               ..0..00....0
       ............               ...1..0..1..
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