TFS 1.X+ put check/delay in a code

[roriscrave]

Hi, i have this scripts, its one quest like anihi, i want to att 2 things in this code.
1) team have 10minutes do make a quest, or they will be removed of the quest
2) if there is a team inside, the outside team must wait the first team finish. If the first team finish before 10 minutes, the other team can enter immediately, without having to wait the remaining time.
for example if the first team entered and did the quest in 5 minutes, the outside team does not need to wait another 5 minutes to enter, they can already enter immediately

local player_positions = {
    [1] = {fromPos = Position(1000, 1000, 7), toPos = Position(1000, 1000, 7)},
    [2] = {fromPos = Position(1000, 1000, 7), toPos = Position(1000, 1000, 7)}
}

local monsters = {
    [1] = {pos = Position(1000, 1000, 7), name = "Orshabaal"},
    [2] = {pos = Position(1000, 1000, 7), name = "Orshabaal"}
}

function onUse(player, item, fromPosition, target, toPosition, isHotkey)

    for i = 1 , #monsters do
        Game.createMonster(monsters[i].name, monsters[i].pos, false, true)
    end
   
    for i = 1, player_positions do
        local creatures = Tile(player_positions[i].fromPos):getCreatures()
        if creatures:isPlayer() then
            creatures:teleportTo(player_positions[i].toPos)
        end
    end
   
   
    return true
end