Run composer update to get all the dependencies.
Run php artisan serve to build the project. The project will run on http://localhost:8000.
Alternatively you can paste the code in any directory and create a virtual host for it or you can access it form apache/htdocs
Navigate to /hit or you can click on the link on the home page. Enter name and message.
Make sure your landing page is not closed and you will see notification like that -
The stream is generated from the landing page.