Need some help with this script, nothing wrong in output?

I checked output, can you help me?

Maps = {"Wobbly Bridge","Tower Of Magic"}
Time_Per_Round = 60
HowLongMessageLasts = 5
HowLongVotingPeriodLasts = 15
MessageToBeStated = "Seconds Left: "
Option = 1
COLOR = 1
function Op1() -- This is where the functions should be combined.
	m = Instance.new("Message", Workspace)
	m.Text = "Map Selected: ".. MAP .."!"
	wait(3)
	m:Destroy()
end
function Op2()
	m = Instance.new("Message", Workspace)
	m.Text = "".. MAP .."____ was picked!"
	wait(3)
	m:Destroy()
end
function Op3()
	m = Instance.new("Message", Workspace)
	m.Text = "You will be playing on the ".. MAP .." map"
	wait(3)
	m:Destroy()
end
function Op4()
	m = Instance.new("Message", Workspace)
	m.Text = ""
	wait(3)
	m:Destroy()
end
Players = game.Players:GetPlayers()
Ls = game.Lighting:GetChildren()
_G.MAPA = {"Wobbly Bridge"}
_G.MAPB = {"Tower Of Magic"}
_G.MAPC = {}
_G.MAPD = {}
_G.MAPE = {}
_G.MAPF = {}
_G.MAPG = {} 
_G.MAPH = {}
_G.MAPI = {}
_G.MAPJ = {}
_G.MAPK = {}
_G.MAPL = {}
_G.MAPM = {}
_G.MAPN = {}
_G.MAPO = {}
_G.MAPP = {}
_G.MAPQ = {}
_G.MAPR = {}
_G.NothingCurrently = {}
Lasting = HowLongVotingPeriodLasts
while true do
	HowLongVotingPeriodLasts = Lasting
	if #Players > 1 then
		for o = 1,#Players do
			gui = game.Lighting.Vote:Clone()
			gui.Parent = Players[o].PlayerGui
		end
		repeat
			a = HowLongVotingPeriodLasts
			wait(1)
			m = Instance.new("Message", Workspace)
			m.Text = "Voting Time: "
			a = a - 1
			wait(1)			
		until a == 0
		m:Destroy()
		for i = 1,#Players do
			val = Players[i].Map.Value
			table.insert(_G[val], val)
		end
			mapn = math.max(#_G.MAPA, #_G.MAPB, #_G.MAPC, #_G.MAPD, #_G.MAPE, #_G.MAPF, #_G.MAPG, #_G.MAPH, #_G.MAPI, #_G.MAPJ, #_G.MAPK, #_G.MAPL, #_G.MAPM, #_G.MAPN, #_G.MAPO, #_G.MAPP, #_G.MAPQ, #_G.MAPR)
			if #_G.MAPA == mapn then
				for u = 1,#Ls do
					if Ls[u]:FindFirstChild("A") ~= nil then
						Pick = Ls[u]
					end
				end
			end
		Mapp = Pick:Clone()
		Mapp.Parent = Workspace
		MAP = Mapp.Name
		if Option == 1 then
			Op1()
		elseif Option == 2 then
			Op2()
		elseif Option == 3 then
			Op3()
		elseif Option == 4 then
			Op4()
		else
			print("Invalid option")
		end
		for y = 1,#Players do
			if COLOR == 1 then
				Players[y].TeamColor = BrickColor.new("Really red")
				COLOR = 2
			elseif COLOR == 2 then
				Players[y].TeamColor = BrickColor.new("Really blue")
				COLOR = 1
			end
		end
	end
end

Any output?