local pos = {x = 1000,y = 1000,z = 7} -- edit this to the position of the stone
function onUse(cid, item, fromPosition, itemEx, toPosition)
if item.itemid == 1945
doTileAddItemEx(pos, uid) -- uid stands for the unique id of the item
doPlayerSendTextMessage(cid,21,"You have added a stone behind you")
elseif item.itemid == 1946
doRemoveItem(uid) -- add same uid here
doPlayerSendTextMessage(cid,21,"You removed the stone")