title: Change background color every 30s (fade transition)
body: <p>I would like someone to tell me what's the code for making a webpage background color (the background color of the whole page) to change (fade transition) every 30s to a given color variety. Is it simple? I guess css will make it easier? </p>
  
  <p>I've searched over the internet and I only found gradients which is not what I want. Thank you in advance. I 've search codepen and jsfiffle for examples but no one had something that simple :/ </p>
  
  <p>Example: While browsing my page I want the background color to change from blue to green and then to orange and again blue and so on so on... :)</p>