How do I make it so that when a player joins there are different clothes each time?

So I have a game. In this game when people join I want them to have specific clothes. But I want it so that it randomizes between characters. So, say I join I get a blue shirt. Someone else joins they get a different shirt. Like that. This is what I have so far for shirt script. How could I add onto this.

game.Players.PlayerAdded:connect(function(Player) -- Once a player is added
Player.CharacterAdded:connect(function() -- Once a Character is added to the Player
if Player.TeamColor == game:GetService("Teams")["Gentlemen"].TeamColor then -- Check their team
wait(1) -- Give it a chance to load, now thinking about it ChildAdded might've been better
for _,v in pairs(Player.Character:GetChildren()) do -- Gather everything in their Character
if v:IsA("Shirt") or v:IsA("Pants") then -- Check if its a shirt or pants
v:Destroy() -- If it is, destroy it
end -- End the if statement
end -- End the for _,v in pairs statement
local Shirt = Instance.new("Shirt",Player.Character) -- Create new shirt
local Pants = Instance.new("Pants",Player.Character) -- Create new pants
Shirt.ShirtTemplate = "rbxassetid://164089580"
Pants.PantsTemplate = "rbxassetid://323913611"-- code here
end -- End the if statement
end) -- End the CharacterAdded function
end) -- End the PlayerAdded function

You could store the possible shirt and pants asset ids in tables and then index a random asset in each table.

Example:

local redShirts -- Table of asset ids
local redPants -- Table of asset ids

local blueShirts -- Table of asset ids
local bluePants -- Table of asset ids

game.Players.PlayerAdded:connect(function(player)
	player.CharacterAdded:connect(function(character)
		-- Delete old clothing

		local shirt = Instance.new("Shirt")
		local pants = Instance.new("Pants")

		if player.TeamColor == BrickColor.Red then
			shirt.ShirtTemplate = redShirts[math.random(#redShirts)]
			pants.PantsTemplate = redPants[math.random(#redPants)]
		else if player.TeamColor == BrickColor.Blue then
			shirt.ShirtTemplate = blueShirts[math.random(#blueShirts)]
			pants.PantsTemplate = bluePants[math.random(#bluePants)]
		end

		shirt.Parent = character
		pants.Parent = character
	end)
end)

If the shirts and pants should be paired up (i.e. shirt at index 1 should be paired with pants at index 1), then you can simply store the randomly generated index and use it to access both tables.

Example:

local index = math.random(#blueShirts)
shirt.ShirtTemplate = blueShirts[index]
pants.PantsTemplate = bluePants[index]