Military rangs with skull

[GOD Kubus]

Hello i have question.
i have on my war server military rangs and skull system. Skull system have many bugs...
How to add skulls in military rang. I have 5 rangs and need to first rangs yellow skull, second green, third white and etc.
Plz help me

<?xml version = "1.0" encoding = "UTF-8"?>
    <mod name = "Military Ranks" version = "1.0" author = "Teckman" enabled = "yes">
        <config name = "ranks"><![CDATA[
            titles = {
                [50] = "Bronze Rang",
                [100] = "Silver Rang",
                [150] = "Gold Rang",
                [200] = "Platinum Rang",
                [500] = "Diamond Rang",
            }
            fragsStorage = 600
        ]]></config>
        <event type = "look" name = "ranksLook" event = "script"><![CDATA[
            domodlib("ranks")
            function onLook(cid, thing, position, lookDistance)
                if(isPlayer(thing.uid)) then
                    local rank = {rank = "Private", frags = 0}
                    for k, v in pairs(titles) do
                        if(math.max(0, getPlayerStorageValue(thing.uid, fragsStorage)) > k - 1) then
                            if(k - 1 > rank.frags) then
                                rank.rank, rank.frags = v, k - 1
                            end
                        end
                    end
                    doPlayerSetSpecialDescription(thing.uid, "\n Military rank: " .. rank.rank .. " Frags: " ..getPlayerStorageValue(thing.uid, fragsStorage)+1)
                       
                   
                end
                return true


            end
        ]]></event>
        <event type = "kill" name = "ranksKill" event = "script"><![CDATA[
            domodlib("ranks")
            function onKill(cid, target)
                if(isPlayer(target)) then
                    setPlayerStorageValue(cid, fragsStorage, math.max(0, getPlayerStorageValue(cid, fragsStorage) + 1))
                    if(titles[getPlayerStorageValue(cid, fragsStorage)]) then
                        doPlayerSendTextMessage(cid, MESSAGE_INFO_DESCR, "You advanced to military rank: " .. titles[getPlayerStorageValue(cid, fragsStorage)] .. ". Congratulations " .. titles[getPlayerStorageValue(cid, fragsStorage)] .. "!")
                        if(titles[getPlayerStorageValue(cid, fragsStorage)]== "Sergeant First Class") then
                            doPlayerAddItem(cid, 9693, 1)
                            end
                    end
                end
                return true
            end
        ]]></event>

        <event type = "login" name = "ranksLogin" event = "script"><![CDATA[
            function onLogin(cid)
                registerCreatureEvent(cid, "ranksKill")
                registerCreatureEvent(cid, "ranksLook")
                return true
            end
        ]]></event>
    </mod>