expand the path

[Espiiii-debug]

Hi, how can I expand my path in the matrix ?
to go from this :
1 0 1 1 1
1 0 1 1 1
1 0 0 0 0
1 1 1 1 1

to this :
1 0 0 1 1
1 0 0 1 1
1 0 0 0 0
1 0 0 0 0
1 1 1 1 1