Simple chat with nodejs ( heroku & nodejs )

you can use any kinde ready node js (only nodejs). i know nodejs some and i can costimize for me. i want simple page listener and active some action. server js will on heroku and clientjs will on my page, im trying to make my page real live. want to listen when someone send message, my price is 10$, u will upload heroku and test together after u will get your money not before.