Where does this script execute the mini game ending?

Please ignore how messy it is. But i'm trying to work out how the script finds out whether the mini game has ended. It works fine, but i'm trying to add certain features, for example when the last person is left alive they will win the game, instead of my other script still counting to 0 whilst nothing is going on.

But to achieve this I need to find out how the script is ended first of all, and its working out to be quite a task.

Thanks in advance.

disasters = {"ColourDrop","Pitfall","Murderer","SwordFight"}



countdownTime = 45 
disasterTime = 10


countdownMessage = "The next disaster will occur in %s seconds."
disasterMessage = "Survive: %s"


items = {}
leaderboard = game.Workspace:findFirstChild("BTS Leaderboard") 
local w = game.Workspace:getChildren()
for i=1,#w do
	if w[i].Name == "leaderboard" and w[i]:findFirstChild("running") ~= nil and w[i]:findFirstChild("coins") ~= nil then
		leaderboard = w[i]
	end
		wait(0.2)

end
for i=1,#disasters do
	local item = game.Lighting:findFirstChild(disasters[i])
	if item ~= nil then
		item.Parent = nil
		table.insert(items, item)
	else
		print("Error! ", disasters[i], " was not found!")
	end
	wait(0.2)
end


function chooseDisaster()
	return items[math.random(#items)]
end


function sethint(text)
	local hint = game.Workspace:findFirstChild("hint")
	if (hint ~= nil) then
		hint.Text = text
	else
		print("Hint does not exist, creating...")
		h = Instance.new("Hint")
		h.Name = "hint"
		h.Text = text
		h.Parent = game.Workspace
	end

end


function removeHint()
	hint = game.Workspace:findFirstChild("hint")
	if (hint ~= nil) then hint:remove() end
end


function countdown(time)
	while (time > 0) do
		wait(1)
		time = time - 1
		_G.countdowngo = ("Game starting in: "..time)
	end
	removeHint()
	return true
end


while true do
	countdown(countdownTime)
		_G.countdowngo=countdownTime
	if leaderboard ~= nil and leaderboard:findFirstChild("running") and leaderboard:findFirstChild("coins") then 
		leaderboard.coins.Value = 5
		leaderboard.running.Value = true
		
	end


	local m = chooseDisaster():clone()


	if disasterMessage ~= nil then
		_G.countdowngo = ("Game: ".. m.Name)
		wait(2)
	end


	m.Parent = game.Workspace
	m:makeJoints()
	wait(disasterTime)
	m:remove()


	if leaderboard ~= nil then
		leaderboard.running.Value = false
	end
	wait(0.2)
end

After wait(disasterTime) on line #93