CodeDoor.lua

local Players: Players = game:GetService("Players")
local CollectionService: CollectionService = game:GetService("CollectionService")
local RunService: RunService = game:GetService("RunService")

local Door: Part = script.Parent

local POSSIBLE_CODES: {[string]: boolean} = {
	["bruce wayne"] = true;
	["batman"] = true;
}

local function Wait(Seconds: number): number
	Seconds = math.max(Seconds or 0.03, 0)
	local TimeRemaining: number = Seconds

	while TimeRemaining > 0 do
		TimeRemaining -= RunService.Heartbeat:Wait()
	end

	return Seconds - TimeRemaining
end

local function Chatted(Message: string): nil
	if POSSIBLE_CODES[string.lower(Message)] then
		Door.Transparency = 0.5
		Door.CanCollide = false
		Wait(1)
		Door.CanCollide = true
		Door.Transparency = 0
	end
end

local function PlayerAdded(Player: Player): nil
	if not CollectionService:HasTag(Player, "IsConnected") then
		CollectionService:AddTag(Player, "IsConnected")
		Player.Chatted:Connect(Chatted)
	end
end

Players.PlayerAdded:Connect(PlayerAdded)
for _, Player: Player in ipairs(Players:GetPlayers()) do
	PlayerAdded(Player)
end