Lua Atribute Upgrade + 1

[jplaubs]

I would like to add the attribute of HP plus it counts several times being that you had + 1 in it, could someone help?

local conf = {
    maxSlotCount = 10,
    perecent = {min = 1, max = 20}, -- od ile % do ilu % ma dawac bonusu
    ignoredIds = {}
}

function choose(...) --- Function by mock.
    local arg = {...}
    return arg[math.random(1,#arg)]
end

function isArmor(uid) -- Function by Mock the bear.
    if getItemInfo(uid.itemid).armor ~= 0 and getItemWeaponType(uid.uid) == 0 then
        return true
    end
    return false
end

function getSlotCount(nam)
    local c = 0
    for _ in nam:gmatch('%[(.-)%]') do
        c = c + 1
    end
    return c
end

function onUse(cid, item, fromPosition, itemEx, toPosition) -- Script by mock the bear (MTB)
    if not checkExhausted(cid, 429, 1) then
        return true
    elseif item.uid == 0 or item.itemid == 0 then
        return false
    elseif isInArray(conf.ignoredIds, itemEx.itemid) or (not getItemWeaponType(itemEx.uid) or getItemWeaponType(itemEx.uid) > 5)
        or (getItemWeaponType(itemEx.uid) == 0 and not isArmor(itemEx))
        or itemEx.itemid == 0 or itemEx.type > 1 or isItemStackable(itemEx.uid) then
        doPlayerSendTextMessage(cid, 24, "You can\'t open a slot on this item.")
        return true
    elseif isCreature(itemEx.uid) then
        return false
    end
  
    local nam = getItemName(itemEx.uid)  
    if getSlotCount(nam) < conf.maxSlotCount then
        local l = choose('hp')
        -- local fist = getPlayerSkill(cid, SKILL_FIST)
        -- local l = choose('hp', 'mp', 'ml', 'cas')
        local p = 1

        doSendMagicEffect(toPosition, 30)
        nam = nam..' ['..l..'.+'..p..'%]'
        doSendAnimatedText(toPosition, l..' '..p..'%', 120)
        doItemSetAttribute(itemEx.uid, 'name', nam)
        -- gainArmor='&p+1',loseArmor='&p-1',
        -- doRemoveItem(item.uid, 1)
    else
        doPlayerSendTextMessage(cid, 24, "You cant open a slot on this item.")
    end
    return true
end