How to make servers locked after a teleportation of 1/8 players happens? [closed]

local TeleportService = game:GetService("TeleportService")
local gameID = 4400018071


function onTouch(hit)
    local player = game.Players:GetPlayerFromCharacter(hit.Parent)
    if player then
        TeleportService:Teleport(gameID, player)

    end
end
script.Parent.Touched:Connect(onTouch)

I use this script to drive a car into a black hole I would prefer if it was timed so it wasn't so buggy also I want the server to lock after 1/8 players have joined so if a game started no more people can join it