What have I done wrong with these 4 lines of code? The lines after the first aren't working

EDIT:

local InRound = game.ReplicatedStorage.InRound
local Timer = game.ReplicatedStorage.Timer
local IntermissionScreen = game.StarterGui.Intermission.Frame
local Maps = game.StarterGui.Intermission.Frame.MapBox.Maps
local Menu = game.StarterGui.Menu.Frame

InRound.Value = false
Timer.Value = 20 -- intermission time
while InRound.Value == false do
    repeat
        Maps.Visible = false
        wait(1)
        Timer.Value -= 1
    until Timer.Value == 30
    Maps.Visible = true
    repeat
        wait(1)
        Timer.Value -= 1
    until Timer.Value == 0
    IntermissionScreen.Visible = false -- this line and below are the one's not working
    Menu.Visible = false
    InRound.Value = true
    -- script the code that will teleport only the players on the intermission screen
end

And yes I'm pretty positive it's not a spelling error or anything like that