Lua Need Help with my Script

[megachock]

Hello, i need some help ...
Im trying to make a script wich when you kill a monster it remove a wall then the wall appears after x seconds.
I made this but dont works..
Also, can someome tell what function show a box with text
Thanks
PD: Im using tfs 0.3.6pl1 8.54

local wallPos =
{
        {x=1212, y=1592, z=3, stackpos = 1},
        {x=1211, y=1592, z=3, stackpos = 1},
        {x=1210, y=1592, z=3, stackpos = 1},
        {x=1219, y=1592, z=3, stackpos = 1},
}
local seg = 12
local mName = {"Water Poliwrath"}
local wallID = {1544}


local function appear (pos)
          doCreateItem (1544,1,wallPos[i])
  end


function onKill(cid, target)
local monster = getCreatureName(target)
    doPlayerSendTextMessage(cid, MESSAGE_STATUS_DEFAULT, monster)
    if isInArray(monster, mName) then
        for i = 1, 3 do
            if monster == mName then
                doRemoveItem(getThingfromPos(wallPos[i]).uid, wallID[i])
                doSendMagicEffect(wallPos[i], 26)
                    addEvent (appear, seg * 1000, wallPos[i])
                            end
        end
    end
end

 

[megachock]

Bump?