title: How to make blur-gradient interaction
body: <p>reference : <a href="http://www.agencekali.com" rel="nofollow noreferrer">http://www.agencekali.com</a></p>
  
  <p>Hello, I wanna learn how to create this blur gradient color and movement in background with css. I assume this is made out of canvas given the sources. But I don't know what keywords I should look it up or how to move forward. Could you suggest articles that I can get the hang of it.</p>