How do you make every players GUI change the same?

Okay im trying to make a round script that shows the time left in a GUI. The problem im having is either it only shows up for the first player to join or the time of every GUI is different. I think the reason for this is because it goes through the loop and counts down from 45 before it runs through the loop again. I've been trying for weeks to fix this and have literally gotten no where. Can anyone please tell me how to fix these problems? Thanks!

I've narrowed the script down to the part im having problems with:

	function Intermission()
		for i,v in pairs(game.Players:GetPlayers) do
			v.PlayerGui.ScreenGui.Frame.Visible = true
				for i= 45,1 -1 do
					v.PlayerGui.ScreenGui.Frame.TextLabel.Text = i
                                end
             end
end

First, ignore the loop.

Let's just make a function that tells everyone a number:

function tellNumber( num )
	for _, v in pairs(game.Players:GetPlayers()) do
		v.PlayerGui.ScreenGui.Frame.TextLabel.Text = num
		-- EDIT: Typo'd `i` for `num`
	end
end

Intermission every second sets the text of everyone. In other words, every second, we tellNumber:

function Intermission()
	for time = 45, 0, -1 do
		tellNumber( time )
		wait(1)
	end
end

If we were to inline the function, it would look like this:

function Intermission()
	for time = 45, 0, -1 do
		for _, v in pairs(game.Players:GetPlayers()) do
			v.PlayerGui.ScreenGui.Frame.TextLabel.Text = time
		end
		wait(1)
	end
end

which is basically just the loops "inside out" from how you originally wrote them.

(I think the code is much clearer and simpler with the function separate though!)