How to make a random map and team generator?

Okay so what you have laid out is spawning players on a random map. Maybe make an intermission period. This will be really basic.

while true do
	wait(30)--intermission
	maps = game.ServerStorage.Maps:GetChildren()
	map = maps[math.random(1, #maps)]
	map:Clone().Parent = game.Workspace

	for _,player in pairs(game.Players:GetPlayers()) do
	    if player.Character then
 		       spawns = map.Spawns:GetChildren()
   	     player.Character:MoveTo(spawns[math.random(1, #spawns)].Position)
 	   end
	end
	wait(300)
	for i,player in pairs(game.Players:GetPlayers()) do
		if player.Character then
			player.Character.Head:remove()
		end
	end
end

that is a basic game script but you mentioned teams correct?

while true do
	wait(30)--intermission
	maps = game.ServerStorage.Maps:GetChildren()
	map = maps[math.random(1, #maps)]
	map:Clone().Parent = game.Workspace
	blue = 0
	red = 0
	local teamplay = game.Players.GetChildren()
	for i = 1,game.Players.NumPlayers do
		local ran = math.random(1,game.Players.NumPlayers)
		if blue == red then -- if they are the same it is randomely generated
			br = math.random(1,2)
			if br == 1 then
				teamplay[ran].TeamColor = BrickColor.new("Bright blue")
			elseif br == 2 then
				teamplay[ran].TeamColor = BrickColor.new("Bright red")
			end
		elseif red >= blue then
			teamplay[ran].TeamColor = BrickColor.new("Bright red")
		elseif blue >= red then
			teamplay[ran].TeamColor = BrickColor.new("Bright blue")
		end
	end
	for _,player in pairs(game.Players:GetPlayers()) do
	    if player.Character then
 		       spawns = map.Spawns:GetChildren()
   	     player.Character:MoveTo(spawns[math.random(1, #spawns)].Position)
 	   end
	end
	wait(300)-- five minutes
	for i,player in pairs(game.Players:GetPlayers()) do
		if player.Character then
			player.Character.Head:remove()
			player.TeamColor = BrickColor.new("White")
		end
	end
end

Just create 3 teams. One Bright blue, One Bright red, and another White. Spawns are still random but if you want to create seperate spawns, I'm sure you can do it (;