Boss mechanic: Help to reshape event

[Marco Oliveira]

Hello, I am reviewing my server scripts and I came across the following event:

local geyser = {
    [1] = Position(33132, 31917, 15),
    [2] = Position(33135, 31919, 15),
    [3] = Position(33135, 31923, 15),
    [4] = Position(33128, 31922, 15),
    [5] = Position(33128, 31918, 15),
    [6] = Position(33124, 31920, 15),
    [7] = Position(33124, 31925, 15),
    [8] = Position(33131, 31927, 15),
    [9] = Position(33135, 31926, 15),
    [10] = Position(33128, 31929, 15),
    [11] = Position(33133, 31930, 15),
    [12] = Position(33127, 31933, 15)
}

local function ativarGeyser(player)
    local frompos = Position(33119, 31913, 15)
    local topos = Position(33142, 31936, 15)
    if(isPlayerInArea(frompos, topos)) then
        addEvent(function()
            local rand = math.random(1,12)
            local geyserPos = Position(geyser[rand])
            local checar1 = Tile(Position(geyserPos)):getItemById(28868)
            if checar1 then
                addEvent(function()
                    local player1 = Game.getPlayers()[1]
                    Game.createItem(28869, 1, geyserPos)
                    player1:say("SPLASH!", TALKTYPE_MONSTER_SAY, false, false, geyserPos)
                    addEvent(function()
                        local checar2 = Tile(Position(geyserPos)):getItemById(28869)
                        if checar2 then
                            checar2:remove()
                        end
                    end, 9 * 1000)
                end, 5 * 1000)
            elseif checar2 then
                return false
            end
            addEvent(function()
                ativarGeyser() end, 1 * 1000)
        end, 8 * 1000)
    end
    return true
end

The following code is initiated by an action: addEvent(ativarGeyser, 1 * 60)

It apparently works well, so my question is about the way in which it was written, is it safe to use it in this way or could it be improved?
The event is similar to the video attached below.