Why is this Main Game Script not Working?

So this is a rather large game script that is supposed to manage the game. It doesn't work, and output isn't giving me anything. Can someone please help me?

Here's the script (Yes, everything in the script is defined):

local Maps = game.ServerStorage.Maps
local Mode = script.Mode
local MV = script.Map
local TDM = script.TeamDeathMatchScript
local TS = script.Time.Countdown
local SL = script.ScoreLimit
local msg = Instance.new("Message")
local USMC = game.Workspace.USMCV
local PLA = game.Workspace.PLAV
local Up = script.Time.TimesUp
local Play = script.Playing

while true do
    if USMC.Value == SL.Value or PLA.Value == SL.Value or Up.Value == true then
        script.Time.Hi.Disabled = true
        Play.Value = false
        MV.Value = "None"
        Mode.Value = "None"
        if Mode.Value == "TDM" then
            msg.Parent = game.Workspace
            if USMC.Value > PLA.Value then
                msg.Text = "USMC won!"
            elseif PLA.Value > USMC.Value then
                msg.Text = "PLA won!"
            elseif PLA.Value == USMC.Value then
                msg.Text = "Tie!"
            end
        if Mode.Value == "Domination" then
            msg.Parent = game.Workspace
            if USMC.Value > PLA.Value then
                msg.Text = "USMC won!"
            elseif PLA.Value > USMC.Value then
                msg.Text = "PLA won!"
            elseif PLA.Value == USMC.Value then
                msg.Text = "Tie!"
            end
        end
        if game.Workspace.Map ~= nil then
            game.Workspace.Map:remove()
        end
        msg.Text = "A new battle is beginning!"
        wait(1.5)
        NewMode()
        wait(2)
        NewMap()
        wait(2)
        Play.Value = true
        script.Time.Left.Value = 45
        script.Time.Hi.Disabled = false
    end
    end
end

function NewMode()
    local y = math.random(1,2)
    if y == 1 then
        msg.Text = "Map Chosen: Team Death Match!"
        Mode.Value = "TDM"
    elseif y == 2 then
        msg.Text = "Mode Chosen: Domination!"
        Mode.Value = "Domination"
    end
end

function NewMap()
    local x = math.random(1,2)
    if x == 1 then
        local Building = Maps.Building:clone()
        Building.Parent = game.Workspace
        Building.Name = "Map"
        msg.Text = "Map Chosen: Building!"
        MV.Value = "Building"
        if Mode.Value == "Domination" then
            Building.Flags:remove()
        end
    elseif x == 2 then
        local House = Maps.House:clone()
        House.Parent = game.Workspace
        House.Name = "Map"
        msg.Text = "Map Chosen: House!"
        MV.Value = "House"
        if Mode.Value == "Domination" then
            House.Flags:remove()
        end
    end
end