Lua Crate that gives you an random item, every hour

[Fermantor]

There are crates in rl Tibia, that gives you an item, every 1 hour, when you click on them. I wanna use this on my server to, but I don't know, how to re-set the StorageValue of an player, if he/she is logged out.
My script so far, look like this:

local Items = {
[1] = {2160,2},
[2] = {2160,2},
[3] = {2160,2},
[4] = {2160,2},
[5] = {2160,2}
}

function onUse(cid, item, fromPos, item2, toPos)
	if getPlayerStorageValue(cid, 11010) == -1 then
		local chance = math.random(1,5)
		for id, item in pairs(Items) do
			if chance == id then
				doPlayerAddItem(cid, item[1], item[2])
				doCreatureSay(cid, "You have found " .. item[2] .. " " .. item[1], 34)
				setPlayerStorageValue(cid, 11010, 1)
				local GUID = getPlayerGUID(cid)
				addEvent(back, 1000*5, GUID)
			end
		end
	else
		doCreatureSay(cid, "You have found nothing usefull.", 34)
	end
	return true
end

function back(id)
	db.query("UPDATE `player_storage` SET `value` = -1 WHERE `player_id` = " .. id .. " AND `key` = 11010")
end

I am using TFS 0.2.14 (mystic spirit, tibia 9.61)

 

[OTx]

Tevo's script -~
There you are:
http://otland.net/f132/chest-you-can-use-once-every-2-days-168676/