How to make players move back to lobby in this script?

wait(1); -- Jaredvaldez4 2011
--game.Lighting.Ambient = BrickColor.new("Bright green").Color;
system = script.Parent
is_playing = system.Playing
stage = system.Stage
weapons = game.Workspace.Weapons
hum_team = game.Teams["Humans"]
zom_team = game.Teams["Zombies"]
msg = nil
hint = nil
playing = false
interrupted = false
minutes = 0
seconds = 0
function displayHint(text)
	if(hint==nil)then
		hint = Instance.new("Hint")
		hint.Text = text
		hint.Parent = game.Workspace
	else
		hint.Text = text
	end
end

function removeHint()
	if(hint~=nil)then
		hint:remove()
		hint = nil
	end
end

function displayMsg(text)
	if(msg==nil)then
		msg = Instance.new("Message")
		msg.Text = text
		msg.Parent = game.Workspace
	else
		msg.Text = text
	end
end

function removeMsg()
	if(msg~=nil)then
		msg:remove() msg = nil
	end
end

function giveWeapons()
	local player = game.Players:GetChildren()
	if(#player>0)then
		for p = 1, #player do
			if(player[p].TeamColor==hum_team.TeamColor)then
				shared["Weps"]["Pistol"]:Clone().Parent = player[p].Backpack
			end
		end
	end
end

function killPlayers()
	local player = game.Players:GetChildren()
	if(#player>0)then
		for p = 1, #player do
			if(player[p].Character~=nil)then
			local h = player[p].Character:FindFirstChild("Humanoid")
				if(h.Health>0)then
					player[p].Character.Humanoid.Health = 0
				else
					if(player[p]:FindFirstChild("Dead")~=nil)then
						player[p].Dead.Value = false
						player[p].Class.Value = "Zombie"
						player[p].TeamColor = hum_team.TeamColor
					end
				end
			end
		end
	end
end

function resetPlayers()
	local player = game.Players:GetChildren()
	if(#player>0)then
		for p = 1, #player do
			if(player[p]:FindFirstChild("Dead")~=nil)then
				player[p].Dead.Value = false
				player[p].Class.Value = "Zombie"
				player[p].TeamColor = hum_team.TeamColor
			end
		end
	end
end

function countPlayers()
	local count = 0
	local player = game.Players:GetChildren()
	if(#player>0)then
		for p = 1, #player do
			if(player[p].Character~=nil)then
				count = count +1
			end
		end
	end

	return count
end

function countPlayersInTeam(team)
	local team_count = 0
	local player = game.Players:GetChildren()
	if(#player>0)then
		for p = 1, #player do
			if(player[p].TeamColor==team.TeamColor)then
				team_count = team_count +1
			end
		end
	end

	return team_count
end

function assignZombies(amount)
	local valid_players = {}
	local player = game.Players:GetChildren()
	if(#player>0)then
		for p = 1, #player do
			if(player[p].TeamColor==hum_team.TeamColor)and(player[p].Character~=nil)then
				table.insert(valid_players,player[p])
			end
		end
	end
	if(#valid_players>amount)then
		while(amount>0)do
			local rand = math.random(1,#valid_players)
			local chosen = valid_players[rand]
			chosen.TeamColor = zom_team.TeamColor
			chosen.Character.Humanoid.Health = 0

			table.remove(valid_players,rand)
			amount = amount -1
		end
	end
end

function countDown()
	seconds = seconds -1
	if(seconds<0)then
		minutes = minutes -1
		seconds = 59
		if(minutes<0)then
			playing = false
			return true
		end
	end

	return false
end

function playZombies()
	resetPlayers()
	for i,v in pairs(game.Players:GetPlayers()) do
		Spawn(function()
			repeat
				wait(0)
			until v.Character and v.Character:FindFirstChild("Torso")

			v.Character.Torso.Anchored = true

			repeat
				wait(0)
			until v
		end)
	end


	is_playing.Value = true

-- ================================================================================== --
-- =============================######CHANGE MAP######=============================== --
-- ================================================================================== --

	if not game.Lighting:FindFirstChild("Maps") then
		local MapsContainer = Instance.new("Model", game.Lighting)
		MapsContainer.Name = "Maps"
	end

	if #game.Lighting.Maps:GetChildren() == 0 then
		displayMsg("There are no loaded maps, can't play!")
		return;
	else
		if workspace:FindFirstChild("cMAP") then
			workspace.cMAP:Destroy()
		end

		for i = 1, math.random(10,30) do
			for ii = 1, #game.Lighting.Maps:GetChildren() do
				displayMsg("Picking Map.... >"..game.Lighting.Maps:GetChildren()[ii].Name.."<")
				wait(0.1337331337331337331337)
            game.Workspace.swoosh:Play()
			end
			wait(0)
		end

		local xzkx = game.Lighting.Maps:GetChildren()[math.random(#game.Lighting.Maps:GetChildren())]:Clone()
		displayMsg("Picking Map....... >>>>>>" .. xzkx.Name .. "<<<<<<")
      game.Workspace.swoosh:Play()

		wait(11)
		removeMsg()

		if (xzkx) then
			xzkx.Name = "cMAP"
			xzkx.Parent = workspace
		else
			displayMsg("Map is null for some awkward reason")
		end
	end

	if(countPlayers()<=3)then
		assignZombies(1)
	elseif(countPlayers()<=6)then
		assignZombies(2)
	else
		assignZombies(3)
	end

	displayMsg("Survive for 13 minutes without getting infected!")
	for i,v in ipairs(game.Players:GetPlayers()) do -- Should fix zombies not morphing.
--		if v.TeamColor == zom_team.TeamColor then
			v:LoadCharacter()
--		end	
	end
	delay(5,function () giveWeapons(); end); -- Wait for respawns?
	delay(5,removeMsg)

	interrupted = false
	playing = true

	minutes = 12
	seconds = 59

	while(playing==true)and(countDown()==false)do
		local humans = countPlayersInTeam(hum_team)
		local zombies = countPlayersInTeam(zom_team)

		if(minutes==9)and(seconds==59)then
			stage.Value = 2
			displayMsg("FAST zombie is NOW UNLOCKED! say '/fastzombie' to become a fast zombie!")
			delay(10,removeMsg)
		elseif(minutes==4)and(seconds==59)then
			stage.Value = 3
			displayMsg("KamiZombie is NOW UNLOCKED! say '/kamizombie' to become a kamizombie!")
			delay(10,removeMsg)
		elseif(minutes==7)and(seconds==25)then
			stage.Value = 4
			displayMsg("Ghost ZOMBIE is NOW UNLOCKED! say '/ghostzombie' to become a Ghost!")
			delay(10,removeMsg)
		elseif(minutes==6)and(seconds==25)then
			stage.Value = 5
			displayMsg("Fast GHOST Zombie is NOW UNLOCKED! say '/fastghostzombie' to become a FastGhostzombie!")
			delay(10,removeMsg)
		elseif(minutes==2)and(seconds==25)then
			stage.Value = 6
			displayMsg("ZOMBIE BOSS is NOW UNLOCKED! say '/zombieboss' to become a BOSS!")
			delay(10,removeMsg)
		end

		if(seconds<10)then
			displayHint("Humans left: "..humans.." | Time left: "..minutes..":0"..seconds.." | Zombies: "..zombies)
		else
			displayHint("Humans left: "..humans.." | Time left: "..minutes..":"..seconds.." | Zombies: "..zombies)
		end

		if(zombies==0)then -- Zombies left the game? Try to assign another to keep the game running!
			if(countPlayers()>=2)then
				if(countPlayers()<=3)then
					assignZombies(1)
				elseif(countPlayers()<=6)then
					assignZombies(2)
				else
					assignZombies(3)
				end
			else
				interrupted = true
				break
			end
		end

		if(humans==0)then
			break
		end

		wait(1)
	end
	stage.Value = 1

	removeHint()

	if(interrupted==true)then
			displayMsg("There are not enough players to continue the game...")
	else
		if(playing==false)then
			displayMsg("YES! Huamns HAVE WON AND SURVIVED THE ZOMBIES! WOOT!")
			game.Workspace.SENSATIONAL:play()
		else
			displayMsg("THERE IS NO HUMANS LEFT HUMANITY IS DEAD! NO!")
			game.Workspace.freshmeat:play()
		end
	end

	is_playing.Value = false

	killPlayers()
	wait(5)
	resetPlayers()

	removeMsg()
end

while true do
	wait(3)
	resetPlayers()
	if(countPlayers()>=2)then
		removeMsg()
		playZombies()
	else
		displayMsg("There are not enough players to continue the game...")
	end
end

For a single player just do

game:GetService("TeleportService"):Teleport(placeid, playertobetpd) --Replace placeid to the lobby id and playertobetpd is just self explanitory.

For all players do

for i, v in pairs(game.Players:GetPlayers()) do --you can replace game.Players:GetPlayers() to a table of a less amount players instead of a table of all of the players, too.
	game:GetService("TeleportService"):Teleport(placeid, v)
end

Just put these wherever you want it to be triggered. If you don't want them to be teleported to another place, then just remove their characters and make a gui visible or something similar.