How can I start this off?

So I really need help with these types of scripts;

I want to make a group only door, right?

How would I start it off? I'm not requesting the whole script, but wouldn't it go something like

local group id = 0000

May contain errors, I based this off of a VipDoorScript for a GamePassID when I was a noob.

GroupID = --Place ID here
Door = script.Parent -- Change this to the door (if needed)
OpenTime = 1 -- Change how long you want the door open

--There used to be a kill script here where if the user was not in the group, it would execute them, but I removed it. If you would like it, PM me on ROBLOX.


--Do not touch below--
Serv = game:GetService("BadgeService")
MServ = game:GetService("MarketplaceService")
if not _G.Players then
	_G.Players = {
		[GroupID] = {};
	}
	print("Players Created")
elseif not _G.Players[GroupID] then
	_G.Players[GroupID] = {};
	print("Players.Pass created")
end

Table = _G.Players[PassOrShirtID]

function CheckPlayer(player2)
	for i = 1,#Table do
		if Table[i] == player2 then
			return true
		end
	end
	return false
end

Door.Touched:connect(function(hit)
	if game.Players:GetPlayerFromCharacter(hit.Parent) then
		player = game.Players:GetPlayerFromCharacter(hit.Parent)
		if Serv:UserHasBadge(player.userId,PassOrShirtID) or CheckPlayer(player) then
			Door.CanCollide = false; Door.Transparency = 0.5;
			wait(OpenTime);
			Door.CanCollide = true; Door.Transparency = 0;
		else
			if Prompt then
				MServ:PromptPurchase(player,PassOrShirtID)
				h = player.Character:FindFirstChild("Humanoid")
				if h then h.WalkSpeed = 0 end
				local con;
				con = MServ.PromptPurchaseFinished:connect(function(ply,asset,purch)
					if ply == player and asset == GroupID then
						con:disconnect()
						if purch then
							if h then h.WalkSpeed = 16 end
							table.insert(Table,player)
						else
							player.Character:BreakJoints()
						end
					end	
				end)
			else
				player.Character:BreakJoints()
			end
		end
	end
end)

I hope it works. Like I mentioned above, it is based off of a VIP Shirt door, so it may not work accurately. Best of luck!

local groupid = 0000

script.Parent.Touched:connect(function(hit)
if hit.Parent:FindFirstChild("Humanoid") ~= nil then
if game.Players:GetPlayerFromCharacter(hit.Parent):IsInGroup(groupid) then
script.Parent.CanCollide = false
wait(1)
script.Parent.CanCollide = true
end
end)

If doesn't work in script try in localscript.