Game script, and in it the teaming function isn't running. Help?

So in this gamescript as said in the title, the function "Teams", isn't working. I'd like some help, what it's basically supposed to do is team players from team spectators to Team blue, and Team Red once the game begins. What it's doing is starting the game, and round but it doesn't do any of the functions. Help please;

BlueTeam = game.Teams["BlueTeam"]:Clone()
local RedTeam = game.Teams["RedTeam"]:Clone()
local NumPlayers = 2

repeat wait(0)until game:FindFirstChild("Teams")
local GameTime = 250 --5 minutes
local A = game:service('Players')
local A1 = "This service is unavailable, please wait until 1 more player joins..."
local A2 = "Welcome to the official meadows sfing game"
local A4 = "5"
local A3 = "The amount of players is successful, and the game will be starting in" .. A4 .. "Seconds.."
local A5 = "Teaming players..."
local A6 = "Blue team has won"
local A7 = "Red team has won"
local redplayers = 0
local blueplayers = 0
local M = Instance.new("Message",game.Workspace)
local H = Instance.new("Hint",game.Workspace)
local TimeForLoop = .5
local players = 0
local GameRun = false
local GameOver = false
local RegenTeams = false

function teams() -- THIS IS THE FUNCTION THAT DOESNT WORK!
local balanceTeams = function(players, teams, randomize, callback)
for key = 1, #players do
local value = table.remove(players, randomize and math.random(#players) or 1);
if (not callback) or callback(key, value) then
value.TeamColor = teams[(key % (#teams + 1)) + 1];
end
end
end;

balanceTeams(
players:GetPlayers(), -- List of all players
{BrickColor.new("Bright red"), BrickColor.new("Bright blue")},
true
);

function checkSpectators()
spectators = 0
for _, player in pairs(game:service('Players'):GetChildren()) do
if player.TeamColor == game.Teams.Spectators.TeamColor then
spectators = spectators + 1 end
if(spectators >= NumPlayers) then
game.Teams.BlueTeam:remove()
game.Teams.RedTeam:remove()
end

wait(3)
end
end
end

function findwinner()
if GameOver then
for _, player in pairs(game.Players:GetPlayers()) do
if player.TeamColor == BlueTeam.TeamColor then
players = blueplayers + 1
wait(5)
if blueplayers == 0 then
print("Blue team has lost")
M.Text = A7
elseif player.TeamColor == RedTeam.TeamColor then
players = redplayers + 1
if redplayers == 0 then
print("Red team has lost")
M.Text = A6
end
end
end
end
end
end

function RegenPlrs()
for i,v in pairs(game.Players:GetPlayers())do
if v and v.Character then
v.Character:BreakJoints()
end
end
end

function StartGame()
if GameRun then
teams()
RegenPlrs()
checkspectators()
findwinner()
end
end

coroutine.resume(coroutine.create(function()
while wait(TimeForLoop)do
if not ( #A:GetPlayers() >= NumPlayers ) then
M.Text = A1
else
StartGame()
M.Text = ""
wait(1)
M.Text = A2
wait(5)
M.Text = A3
for z = 5, 0, -1 do
M.Text = ""..z
wait(1)
end
for i = GameTime, 0, -1 do
H.Text = "Time left: "..i
wait(1)
end
wait(2)
M.Text = "Times up!"
wait(2)
M.Text = "Starting new round..."
wait(2.5)
end
end
end))

I may be incorrect, but the variable 'GameRun' is never set to true, which in turn doesn't allow StartGame to run.