[Help] Area damage on creature and player

[Nemphis]

Hey! Me and my companion have made a lever that sends magic effect on 'positions' and a timer that makes you wait before you can do it again.
What we need help with Is that when a player use this lever YOU or CREATURE only get damaged and looses health If you stand on 'Positions!'

local t = {
timer = 1,
event = 0
}

local cfg = {
positions = {
  {x=2386, y=2539, z=12},
        {x=2386, y=2541, z=12},
        {x=2386, y=2543, z=12},
        {x=2387, y=2538, z=12},
        {x=2389, y=2538, z=12},
  {x=2397, y=2538, z=12}
}
}

local function addRock(cid)

leverPos = { x=2392, y=2540, z=12, stackpos=1 }
getLever = getThingFromPos(leverPos)
leverID = 1946

doTransformItem(getLever.uid, leverID -1)
t.event = 0
end
function onUse(cid, item, fromPosition, itemEx, toPosition)
if(not isPlayer(cid)) then
  return true
end
        if t.event <= 0 and item.actionid == 7050 and item.itemid == 1945 then
  for _, t in pairs(cfg.positions) do
  doSendMagicEffect(t,6)
  end
  doPlayerSendTextMessage(cid,21,"")
  doTransformItem(item.uid,item.itemid+1)

  t.event = addEvent(addRock, t.timer * 1000, getThingPos(item.uid), cid)
else
  doPlayerSendTextMessage(cid, 19, "It's powering up!")
  doSendMagicEffect(getPlayerPosition(cid), 2)
end
return true
end

Thanks!