How to teleport a player randomly between two games?

I want a script to teleport a player to game #1 or game #2 but I was never really good with randomizers. Here is script it's a little bit messy:

local TeleportService = game:GetService("TeleportService")
local gameID = 1766746368
local player = game.Players.LocalPlayer
local gameId = 1766751281

math.random(10,20)
wait(math.random)

local random = math.random(0,1)
if random > 1 then
        TeleportService:Teleport(gameID, player)
    end
 
if not random <= 1 then
	TeleportService:Teleport(gameId, player)
end