How to change guis all at once?

This script only changes each player's gui one at a time. How do you change the text of everyone's gui all at once?

function countdown()
	local players = game.Players:GetPlayers()
	for i = 1, #players do
		players[i].Character.Humanoid.NameOcclusion = Enum.NameOcclusion.OccludeAll
		local stats = players[i].PlayerGui.fullGui.everything.gamePlay.informer
		local spawn = game.ServerStorage.WeaponSpawns:Clone()
		spawn.Parent = Workspace
		stats.Text = '3'
		wait(1)
		stats.Text = '2'
		wait(1)
		stats.Text = '1'
		wait(1)
		stats.Text = 'Begin!'
		stats.FontSize = 'Size48'
		wait(2)
		stats.Text = ''
		wait(1)
		stats.Text = 'Objective: Find a weapon.	'
		stats.FontSize = 'Size36'
	end
end
countdown()

I answered your question on the Roblox Forums >.>

Learn how to use Coroutines. They allow you to execute code like seperate scripts: http://wiki.roblox.com/index.php?title=Beginners_Guide_to_Coroutines