How would I go about checking if every player is touching a part, and if they are then execute code?

I've exhausted about every bit of my knowledge with Touched and GetTouchingParts(), so I was looking for some advice. I'm trying to make an elevator game and once the level is complete, the door cannot be closed until every player is inside.

I know I should do something with an invisible part and the Touched thing, but I can't think exactly what I should do so that my code is efficient.

What I was hoping for would be sort of like this (after all the necessary setup of course)

if #PlayersTouchingPart == #Players:GetPlayers() then
	CloseDoor() --function for closing door
	return
else
	return
end

Although I've tried this and I just can't get around it. Any ideas or advice would be appreciated.

Merry Christmas / Happy Holidays!

I think your best bet would be to create a table of players that are in the elevator. This could be done by getting the characters that are touching the elevator floor and using Players:GetPlayerFromCharacter()

local PlayersInElevator = {}
for i,v in pairs(Part:GetTouchingParts()) do
	local char = v.Parent
	if char:FindFirstChild("Humanoid") then
		local plr = Players:GetPlayerFromCharacter(char)
		if plr then
			table.insert(PlayersInElevator, plr)
		end
	end
end

With this table of players, you could loop through the list of Players that are in the server, and check if each of them are in the table. Maybe check every half second or so

local function CheckElevatorPlayers()
	for i,plr in pairs(Players:GetPlayers()) do
		if table.find(PlayersInElevator, plr) == nil
			return false --there is a player that isn't in the elevator
		end
	end
	return true
end

And if this function returns true, you know that its safe to use CloseDoor().

It doesn't seem to work. I'll try to provide a better section of code.

Click.MouseClick:Connect(function()
	if IsLevelLoaded.Value == true then
		if Door.Position == Vector3.new(21.5, 7, -21.5) then
			--here would be the check for if every player is in the elevator, (and of course if 		the level has been completed, which I've already figured out)
			MoveDoor(Vector3.new(21.5, 7, -26.5))
			Door["close"]:Play()
			script.Parent.Position = Vector3.new(24.5, 6.5, -20.5)
			return
		end
		if Door.Position == Vector3.new(21.5, 7, -26.5) then
			MoveDoor(Vector3.new(21.5, 7, -21.5))
			Door["open"]:Play()
			script.Parent.Position = Vector3.new(24.5, 5.5, -20.5)
			return
		end
		print("door is currently in motion")
		return
	end
	print("level is not loaded yet")
end)