title: How to create a nav bar that follows and adds logo as you scroll?
body: <p>How do you recreate a navigation bar like the one found <a href="http://zendesk.com" rel="nofollow">Here</a></p>
  
  <p>here if you scroll, not only does the navigation bar follow you at the top, but the symbol of the company fades into the navigation bar. </p>
  
  <p>Can someone help or guide me in the right direction please? </p>