body {

  background-image: url(https://cdn.glitch.com/4b2bc20f-06da-425a-8da1-19f3ccf66454%2Fbiggretch.jpg?v=1590803767254);
  

  background-position: center center;
  
 
  background-repeat: no-repeat;
  

  background-attachment: fixed;
  
 
  background-size: cover;
 
  background-color: #464646;
}

@media only screen and (max-width: 767px) {
  body {
    /* The file size of this background image is 93% smaller
       to improve page load speed on mobile internet connections */
    background-image: url(https://cdn.glitch.com/4b2bc20f-06da-425a-8da1-19f3ccf66454%2Fbiggretch.jpg?v=1590803767254);
  }
}