How do i wait for a int value to have a certain value?

I have a script here:

Counter = Instance.new("IntValue", workspace)
Counter.Name = "PlayerCount"
Counter.Value = #game.Teams.Eliminating:GetPlayers()

while true do
	wait(20)
	if Counter.Value < 1 or Counter.Value == 1 then
		print("There is a winner")
		game.Workspace.Ground:Destroy()
		print("Ground has melted")
		wait(3)
		for _, player in ipairs(game.Players:GetPlayers()) do
    player.Team = game.Teams.Eliminating
		print("Teams have changed")
		game.Lighting.Ground:Clone().Parent = game.Workspace
		print("Snow has refrosen")
		end
	end
end

But the problem with this is that it is not efficiant, so how do I change this script so that instead of doing a loop, it simply waits for the counter value to have a value = or lower than 1.

Thanks in advance.