Reset lever

[Massacre Madnes]

Hi I wanted to make it so when a person pulls a lever after a minute it resets on its own.

here is the script I am using..

function onUse(cid, item, frompos, item2, topos)

local wallpos1    = {x=2567, y=3141, z=9, stackpos=1}   --- coordinates of the wall to be removed ---
local wall1    = getThingfromPos(wallpos1)
local toPos = {x=2559, y=3140, z=10} 
local wallID    = 1387 --- item id of the wall to be removed ---


    if item.itemid == 1946 then
        doRemoveItem(wall1.uid, 1)
    elseif item.itemid == 1945 then
        doCreateTeleport(wallID, toPos, wallpos1)
		addEvent(doTransformItem, 1*60*1000, item.uid, 1946)
    end

end

As you see, the script makes a teleporter when you flip the switch from 1946 to 1945 that works perfectly.

when you use it again, it goes back to 1946 and removes the teleporter.

What I also want it to do is automatically after a minute, to have the switch go back to 1946 and remove the teleport on its own.

Can someone tell me what I am doing wrong?