title: I want to make an image fullscreen until I scroll
body: <p>Here is the page I am trying to apply this full screen image to:
  <a href="http://www.alexwiley.co.uk/portfolio" rel="noreferrer">http://www.alexwiley.co.uk/portfolio</a></p>
  
  <p>I wish to make it so that the image displays 100% width and 100% height until you scroll down, then you can see the content below this as you scroll.</p>
  
  <p>Here is an example site of what I am looking to do:
  <a href="http://www.nilsfrahm.com/" rel="noreferrer">http://www.nilsfrahm.com/</a></p>
  
  <p>You can see his image is fullscreen until he scrolls.</p>
  
  <p>I am making this website in Adobe Muse CC just as added information.</p>