html {
  height: 100%;
  /* max-height: 600px; */
  width: 1000px;
  background-color: hsla(200,40%,30%,.4);
  background-image:   
    url('https://78.media.tumblr.com/cae86e76225a25b17332dfc9cf8b1121/tumblr_p7n8kqHMuD1uy4lhuo1_540.png'), 
    url('https://78.media.tumblr.com/66445d34fe560351d474af69ef3f2fb0/tumblr_p7n908E1Jb1uy4lhuo1_1280.png'),
    url('https://78.media.tumblr.com/8cd0a12b7d9d5ba2c7d26f42c25de99f/tumblr_p7n8kqHMuD1uy4lhuo2_1280.png'),
    url('https://78.media.tumblr.com/5ecb41b654f4e8878f59445b948ede50/tumblr_p7n8on19cV1uy4lhuo1_1280.png'),
    url('https://78.media.tumblr.com/28bd9a2522fbf8981d680317ccbf4282/tumblr_p7n8kqHMuD1uy4lhuo3_1280.png');
  background-repeat: repeat-x;
  background-position: 
    0 20%,
    0 100%,
    0 50%,
    0 100%,
    0 0;
  background-size: 
    2500px,
    800px,
    500px 200px,
    1000px,
    400px 260px;
  animation: 50s para infinite linear;
  }

@keyframes para {
  100% {
    background-position: 
      -5000px 20%,
      -800px 95%,
      500px 50%,
      1000px 100%,
      400px 0;
    }
  }

// that's one steeep cliff face
// in episode 3 of jojo's bizarre adventure, there's this really short scene when jojo arrives at london and the city is introduced in a similar way. 
// This method is pretty common in many animated shows. 
// I got lazy and stopped making my own art assets and put this together with images found from around the web -_-