url:: https://youtu.be/a7EjmdQzPqY channel:: Corey Schafer publish_date:: 2015-10-28 --- <center><iframe width="560" height="315" src="https://www.youtube.com/embed/a7EjmdQzPqY" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe></center> --- -