ok that's the script...
function onUse(cid, item, fromPosition, itemEx, toPosition)
local getitem = getTileItemById({x=552, y=636, z=9}, 6548).uid
local wallchk = getTileItemById({x=547, y=641, z=9}, 1387).uid
local wallchk2 = getTileItemById({x=547, y=641, z=9}...