invulnerable when on a certain cell

[Buda Beads]

Invulnerable when on a certain cell....

In a PVP Map,

is it possible to make a 3x3 cell in a middle?

in the 3x3 cell, they cannot either attacked or be attacked. (like a safety wall)

Thanks Master Scripters....

[zeshan321]

http://rathena.org/wiki/Setcell

Example:
setcell "dm_arena",81,44,87,55,cell_basilica,1;

from eKoh's script ^