How to I get a script to wait until 8 people are in a elevator before it starts? HELP! [closed]

This is one way of doing it. Continuously checks the interior of the elevator using Region3 and FindPartsInRegion3 and checks the amount of players inside the elevator until 8 players are found. Be sure to modify min and max to replicate the actual size and coordinates of your elevator.

This also wasn't tested, so i'm not sure it works, but the algorithm should be correct. Let me know if you have any trouble.

local min = Vector3.new(0, 0, 0)
local max = Vector3.new(10, 10, 10)

local region = Region3.new(min, max)

while true do
    local container = game.Workspace:FindPartsInRegion3(region, 100)
    local players = {}

    for _, child in pairs(container) do
        if (child.Parent:FindFirstChild("Humanoid")) then
            for _, element in pairs(players) do
                if (element.Name == child.Parent.Name) then
                    break
                end
            end

            table.insert(players, child.Parent.Name)
        end
    end

    if (#players >= 8) then
        startGame()
    end

    wait(1)
end

local touchCount = 8-- Amount of People
local touchers = {" "} --Elevator Part Name
script.Parent.Touched:Connect(function(p)
    if p:IsA("BasePart") then
        touchCount = touchCount + 1
        table.insert(touchers,p.Parent.Name)
    end
end)
local TeleportID = 1 --Place ID
spawn(function()
    while true do wait()
        if touchCount >= 8 then
            for_, Plr in pairs(game.Players:GetChildren()) do
                game:GetService("TeleportService"):Teleport(TeleportID,Plr)
            end
        end
    end
end)