Lobby teleporter with 20 second wait?

I've been trying to make this Teleporter for my Lobby that teleports into the actual game but it doesn't seem to work

It has to work like this "The player walks on the platform" "It has a countdown on like 20" "after those 20 seconds are gone the player should teleport but if the player walks off the platform it shouldn't teleport Anybody got an idea for what I'm missing? Thanks I'm still pretty new to scripting

debounce = false

local TeleportService = game:GetService("TeleportService")
local gameID = 4975499287 
 
function onTouched(hit)
	if debounce == false then
		debounce = true
	print("Teleporter1 Touched")
    local player = game.Players:GetPlayerFromCharacter(hit.Parent)
    if player then
	wait(20)
        TeleportService:Teleport(gameID, player)
    end
end
script.Parent.Touched:connect(onTouched)
script.Parent.TouchEnded:Connect(function()
	if debounce == true then
		debounce = false
	end
end)

Hello, shark! Try using a function that waits 20 seconds and then teleports the player as the function won't stop running after a player walks off the part. Try this:

local debounce = false

local TeleportService = game:GetService("TeleportService")
local gameID = 4975499287 

local function teleportPlayer(player)
	wait(20)
	TeleportService:Teleport(gameID, player)
end

local function onTouched(hit)
	if debounce == false then
		debounce = true
		print("Teleporter1 Touched")
		local player = game.Players:GetPlayerFromCharacter(hit.Parent)

		if player then
			teleportPlayer(player)
		end
	end
end

script.Parent.Touched:Connect(onTouched)
script.Parent.TouchEnded:Connect(function()
    if debounce == true then
        debounce = false
    end
end)