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