drupal-erable/web/themes/erabletheme/scss/partials/_background.scss

#background {
  z-index: -1;
  max-width: 99vw;
  width: 100vw;
  overflow: hidden;
  position: absolute;
  top: 0;
  left: 0;
  img {
    position: absolute;
    pointer-events: none;
  }
  #bg-top {
    /* #bg-1 {
      top: 5vh;
      left: 0;
    } */
    #bg-3 {
      top: 13vh;
      left: -10vw;
    }
    #bg-2 {
      top: 8vh;
      left: -28vw;
    }
    #bg-5 {
      width: 20vw;
      top: 5vh;
      right: -10vw;
    }
    /* #bg-4 {
      top: 18vh;
      right: -45vw;
    } */

  }
  #bg-middle {
    #bg-6 {
      top: 5vh;
      right: -5vw;
    }
    #bg-7 {
      width: 85vw;
      top: 10vh;
      right: 0vw;
    }
    /* #bg-8 {
      width: 80vw;
      top: 45vh;
      left: -40vw;
    } */
    #bg-12 {
      width: 105vw;
      left: -5vw;
      top: 30vh;
    }
  }
  #bg-bottom {
    #bg-11 {
      top: -70vh;
      right: -5vw;
    }
    #bg-10 {
      width: 110vw;
      top: -150vh;
      left: 5vw;
    }
    #bg-4 {
      transform: scaleX(-1);
      top: -40vh;
      left: -45vw;
    }
  }
}