How can I start this off?

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.