Taking a few seconds to pop up?

This script makes a Gui pop up but it is taking about 2 seconds to pop up. I want the gui to pop up right when touched the part.

local stop = false

game.Workspace.GuiTextChanged.Touched:connect(function(PartTouched)
if not stop then
stop = true
local Text1 = "Oh gosh, that wall was not there before! Oh no!"
local Player = game.Players:GetPlayerFromCharacter(PartTouched.Parent)

    Player.PlayerGui.TalkingGui.Frame.TextLabel.Visible = true


    local function Type(Text)
 Player.PlayerGui.TalkingGui.Frame.Visible = true
local CurrentText = Player.PlayerGui.TalkingGui.Frame.TextLabel.Text
 local Length = Player.PlayerGui.TalkingGui.Frame.TextLabel.Text:len()
 for i = Length,0,-1 do
  wait()
  Player.PlayerGui.TalkingGui.Frame.TextLabel.Text = CurrentText:sub(0,i)
 end
 wait(.5)
 local Length = Text:len()
 for i = 1,Length do
  wait()
  Player.PlayerGui.TalkingGui.Frame.TextLabel.Text = Text:sub(1,i)
 end
end

wait(2)
Type(Text1)
wait(2)
Type("")

Player.PlayerGui.TalkingGui.Frame.Visible = false
wait(5) -- how long you want it to be
stop = false

end
end)