Lua Reward according to number of participants

[mcfeba]

Good afternoon,

I have a code that gives me a 100% chance of reward if I am only one player in the boss, what I wanted to do is this:
Who attacks the boss enters the list of participants who will win the estorage
The more participants the change of winning storage was bigger

example: 1 only killed the boss he would have a 60% chance to get estorage
2 killed the boss, each of them would have a 70% chance to get estorage
3 killed the boss, each of them would have an 80% chance to get estorage
4 killed the boss, each of them would have 90% chance of getting estorage
5 killed the boss, each of them would have a 100% chance of getting estorage

But it could not be a draw for all participants, but it would have to be individual.

local bosses = {
    ['behemoth'] = {storage = 77076},
}

function onKill(creature, target)
    local targetMonster = target:getMonster()
    if not targetMonster then
        return true
    end

    local bossConfig = bosses[targetMonster:getName():lower()]
    if not bossConfig then
        return true
    end

    local participantes = {}
        for pid, _ in pairs(targetMonster:getDamageMap()) do
            local attackerPlayer = Player(pid)
            if attackerPlayer then
            table.insert(participantes, attackerPlayer)
            end
        end
    math.randomseed(os.time())
    for i = 1, #participantes do
        local playerSorteado = participantes[math.random(i)]
        if playerSorteado and playerSorteado:getStorageValue(bossConfig.storage) ~= 1 then
            playerSorteado:setStorageValue(bossConfig.storage, 1)
                playerSorteado:getPosition():sendMagicEffect(56)
                playerSorteado:sendTextMessage(MESSAGE_EVENT_ADVANCE, "You were chosen to take the boss's treasure in Adventurers Guild.")
        end
    end
        return true
end

Follow the code and I use today