Transition to GUI?

Hey guys,

I have decided that I want to change the scripts for my game so that rather than Messages and Hints, I want to have GUIs instead.

How would I change this to show GUIs and not Messages?

for i = 1, Delay*1 do
		Message.Text = "The Next Race will begin in " .. Delay*1-i
		wait(1)
		end
	local msg = Instance.new("Message")
	msg.Parent = game.Workspace
	msg.Text = ("Course : Original by Michael007800")
	wait(5)
	msg:remove()
	local New = Instance.new("Message")
	New.Parent = workspace
	New.Text = "THE RACE HAS BEGUN!!!!!"
	game.Lighting.Map1:clone().Parent = game.Workspace
	script.Sound1:play()
	script.RaceStart1:play()
	script.RaceStart2:play()
	script.RaceStart3:play()
	script.RaceStart4:play()
	script.RaceStart5:play()
	script.Parent.CanCollide = false
	script.Parent.Transparency = 1
	wait(3)
	New:remove()
	wait(2)
	script.Parent.CanCollide = true
	script.Parent.Transparency = 0
		for i = 1, ZombieAttackTime*1 do
		Message.Text = "The Next Race will end in " .. ZombieAttackTime*1-i
		wait(1)
	end
	local New = Instance.new("Message")
	New.Parent = workspace
	New.Text = "THE RACE HAS ENDED!!!!!"
	game.Workspace.Map1:remove()
	script.Sound1:stop()
	script.Parent.CanCollide = true
	script.Parent.Transparency = 0
	wait(3)
	New:remove()

Cheers in advanced,

Michael