title: How to put a picture in each corner of the screen
body: <p>I think my question is pretty understandable with this image : (Seems like I can't post images for now... Here's the link)
  <a href="https://i.imgur.com/xpCaj0U.png" rel="nofollow noreferrer">http://i.imgur.com/xpCaj0U.png</a></p>
  
  <p>I'd want to have pictures in each corners with just a 2px borders taking the whole screen.
  Seems like a dumb question to me but didn't find a solution since I'm a beginner. Anyways I'd like to know the best way of doing this, considering that I'll maybe put gif's animating on hover.</p>
  
  <p>Thank you in advance for you help :)</p>