How do i get check if only one "playing" player is left?

Here a script

local function Start ()

	script.Parent.Text = 30

	for i=1, 30 do

		wait(1)

		script.Parent.Text = script.Parent.Text - 1

	end

	Workspace.Events.Restart:FireAllClients()

end)

Workspace.Events.Start.OnServerEvent:Connect(Start)

--if you see misspelled things please forget it, i'm not in studio

Now, what if i want to make the loop to stop if a there are only _ "playing" player is left.

local function Start ()

	local players = workspace.NumberOfPlayers.Value -- lets imagine this int value have the 		 
        amount of players currently in the game

	local currently = instance.new("intvalue", workspace)
	currently.Name = currently
	currently.Value = NumberOfPlayers.Value -- sets the number players who is playing

	script.Parent.Text = 30

	for i=1, 30 do

		wait(1)

		script.Parent.Text = script.Parent.Text - 1
		
		if currently == 1 then break -- im not used to "break" so if anything is wrong pls tell

	end

	Workspace.Events.Restart:FireAllClients()

end)

Workspace.Events.Start.OnServerEvent:Connect(Start)

--if you see misspelled things please forget it, i'm not in studio

Now how do i make "currently" negate if a player died?

You could make a BoolValue with the name "InGame" then if theyre ingame make it check "True" and if they die.. make it so it goe's to false.. Then do for example:

for i,v in pairs(game.Players:GetChildren()) do
	if v.InGame.Value == true then
		print(v.Name)
	end
end

This would be much easier then the method with tables above this (In my opinion)