title: Can someone explain the code behind the marked area on this website?
body: <p>I am trying to figure out how to add a background that extends to the edges of the page no matter what the size, like on the website here <a href="http://www.wisemanpanel.co.nz/" rel="nofollow noreferrer">http://www.wisemanpanel.co.nz/</a></p>
  
  <p>And I'm talking about this particular area that is highlighted in green
  <a href="https://i.stack.imgur.com/mU9S1.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/mU9S1.jpg" alt="enter image description here"></a></p>
  
  <p>I've been looking at the source code and I can't find anything specifically for that part, also have tried right click -> inspect but still didn't find much, perhaps I have poor research skills.</p>
  
  <p>I would just like a basic example of what the html/css would look like please if anyone could provide it?</p>