Traps Problem Need Help

[Blackcody]

local pos1 = {x = 1439, y = 1496, z = 7}
local pos2 = {x = 1438, y = 1496, z = 7}
local pos3 = {x = 1440, y = 1496, z = 7}
local id = 1511
local time = 7
local time1 = 1

function onStepIn(cid, item, pos)
    addEvent(doCreateItem,time1 * 1000, id,1,pos1)
    addEvent(doCreateItem,time1 * 1000, id,1,pos2)
    addEvent(doCreateItem,time1 * 1000, id,1,pos3)    
    addEvent(doCleanTile,time * 1000, id,1,pos1, false)
    addEvent(doCleanTile,time * 1000, id,1,pos2, false)
    addEvent(doCleanTile,time * 1000, id,1,pos3, false)
    return true
end

I Need It To Just Remove The The Id Not EveryThing On The Tile

 

[VirrageS]

local pos = {
	[1] = {x = 1439, y = 1496, z = 7},
	[2] = {x = 1438, y = 1496, z = 7},
	[3] = {x = 1440, y = 1496, z = 7}
}

local id = 1511
local time = 7
local time1 = 1


onStepIn(cid, item, position, lastPosition, fromPosition, toPosition, actor)
	for i = 1, 3 do
		addEvent(doCreateItem, time1 * 1000, id, 1, pos[i])
		addEvent(removeBlades, time * 1000, pos[i], id)
	end
	return true
end

function removeBlades(pos, Id)
	local thing = getTileItemById(pos, Id).uid
	if thing > 0 then
		doRemoveItem(thing)
	end
end