I cant figure out why my script is not working?

Sorry, Im really new at scripting it's giving me an error over hunting. I have looked for a while and I'm not sure what's wrong with it. any help would be awesome. Thanks!

local mypart = Instance.new("Part",workspace)
local myPos = Vector3.new(0,10,0)
local myLook = Vector3.new(0,1,0)
local myCFrame = CFrame.new(myPos,myLook)
mypart.Anchored = true

while (1) do
    mypart.CFrame = myCFrame
    Pigred72 = workspace:WaitForChild("Pigred72")
    myLook = Pigred72.HumanoidRootPart.Position
    myCFrame = CFrame.new(myPos,myLook)
    wait ()
end

local function getClosestAvatarPostion(part)
    local Players = game.Players:GetChildren()
    local PlayerPostion = {}
    if #PlayerPostion then

        for key, Player in pairs(Players) do
            local plName = Player.Name
            local plPos = game.Workspace:WaitForChild(Player.Name).HumanoidRootPart.Positon
            local plDis = (part.Position - plPos).magnitude
            table.insert(PlayerPostion,key{plName,plPos,plDis})
        end

        Hunting = PlayerPostion[1]

        for x = 1,#PlayerPostion,1 do
            if PlayerPostion[x][3] < Hunting[3]then
                Hunting = PlayerPostion[x]
            end
        end
        if Hunting then
            return Hunting[2]
            else
           return part.Postion  
        end

     else
        return part.Postion     
    end
end