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HTML

              
                <div class="all-wrap">  
  <div class="all">
    <div class="yarn"></div>
    <div class="cat-wrap">    
      <div class="cat">
        <div class="cat-upper">
          <div class="cat-leg"></div>
          <div class="cat-leg"></div>
          <div class="cat-head">
            <div class="cat-ears">
              <div class="cat-ear"></div>
              <div class="cat-ear"></div>
            </div>
            <div class="cat-face">
              <div class="cat-eyes"></div>
              <div class="cat-mouth"></div>
              <div class="cat-whiskers"></div>
            </div>
          </div>
        </div>
        <div class="cat-lower-wrap">
          <div class="cat-lower">
            <div class="cat-leg">
              <div class="cat-leg">
                <div class="cat-leg">
                  <div class="cat-leg">
                    <div class="cat-leg">
                      <div class="cat-leg">
                        <div class="cat-leg">
                          <div class="cat-leg">
                            <div class="cat-leg">
                              <div class="cat-leg">
                                <div class="cat-leg">
                                  <div class="cat-leg">
                                    <div class="cat-leg">
                                      <div class="cat-leg">
                                        <div class="cat-leg">
                                          <div class="cat-leg">
                                            <div class="cat-paw"></div>
                                          </div>
                                        </div>
                                      </div>
                                    </div>
                                  </div>
                                </div>
                              </div>
                            </div>
                          </div>
                        </div>
                      </div>
                    </div>
                  </div>
                </div>
              </div>
            </div>
            <div class="cat-leg">
              <div class="cat-leg">
                <div class="cat-leg">
                  <div class="cat-leg">
                    <div class="cat-leg">
                      <div class="cat-leg">
                        <div class="cat-leg">
                          <div class="cat-leg">
                            <div class="cat-leg">
                              <div class="cat-leg">
                                <div class="cat-leg">
                                  <div class="cat-leg">
                                    <div class="cat-leg">
                                      <div class="cat-leg">
                                        <div class="cat-leg">
                                          <div class="cat-leg">
                                            <div class="cat-paw"></div>
                                          </div>
                                        </div>
                                      </div>
                                    </div>
                                  </div>
                                </div>
                              </div>
                            </div>
                          </div>
                        </div>
                      </div>
                    </div>
                  </div>
                </div>
              </div>
            </div>
            <div class="cat-tail">
              <div class="cat-tail">
                <div class="cat-tail">
                  <div class="cat-tail">
                    <div class="cat-tail">
                      <div class="cat-tail">
                        <div class="cat-tail">
                          <div class="cat-tail">
                            <div class="cat-tail">
                              <div class="cat-tail">
                                <div class="cat-tail">
                                  <div class="cat-tail">
                                    <div class="cat-tail">
                                      <div class="cat-tail">
                                        <div class="cat-tail">
                                          <div class="cat-tail -end"></div>
                                        </div>
                                      </div>
                                    </div>
                                  </div>
                                </div>
                              </div>
                            </div>
                          </div>
                        </div>
                      </div>
                    </div>
                  </div>
                </div>
              </div>
            </div>
          </div>
        </div>
      </div>
    </div>
  </div>
</div>
              
            
!

CSS

              
                $color-bg: #1F1F3C;
$color-fur-light: #D5E8F8;
$color-fur-dark: #8B9BD9;
$color-features: #4B4D75;
$color-features-light: #9FA2CB;
$color-yarn: #DB242A;
$duration: 7s;
$easing: cubic-bezier(0.5, 0, 0.5, 1);
$offset: .5s;
$swings: 5 -10 10 -15 23 -23 15 -10 5;
$total-swings: length($swings);

.all-wrap {
  animation: bob $duration $easing infinite both;
}

.all {
  top: 10rem;
  left: calc(50% - 2.5rem);
  position: absolute;
  width: 5rem;
  height: 5rem;
  transform-origin: center -20rem;
  animation: swing $duration $easing infinite both;
  
  &:before {
    height: 20rem;
    width: 2px;
    background-color: $color-yarn;
    left: calc(50% - 1px);
    bottom: 20rem;
  }
}

.yarn {
  position: absolute;
  top: 0;
  left: 0;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background-image: radial-gradient(circle at top left,
    lighten($color-yarn, 20%),
    $color-yarn 50%,
    darken($color-yarn, 10%));
  z-index: 1;
  
  &:before, &:after {
    position: absolute;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background-color: white;
    top: -1px;
  }
  
  &:before {
    left: calc(50% + 7px);
    background-color: lighten($color-fur-dark, 10%);
  }
  &:after {
    right: calc(50% + 7px);
    background-color: $color-fur-light;
  }
}

.cat-wrap {
  position: absolute;
  top: 0;
  left: calc(50% - 45px);
  width: 90px;
  height: 130px;
  animation: reverse-swing $duration $easing infinite both; // cancel swing
  transform-origin: top center;
}

.cat {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  animation: swing $duration .2s infinite both;
  transform-origin: top center;
}

.cat-upper {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  transform-origin: top center;
  z-index: 1;
  
  .cat-leg {
    position: absolute;
    width: 20px;
    height: 100%;
    background-color: white;
    z-index: -1;
    background-image: linear-gradient(to right,
      $color-fur-light,
      $color-fur-light 20%,
      $color-fur-dark);
    
    &:nth-child(1) {
      border-top-left-radius: 100px;
      left: 10px;
      
      &:after {
        left: 50%;
      }
    }
    
    &:nth-child(2) {
      border-top-left-radius: 0;
      border-top-right-radius: 100px;
      right: 10px;
      
      &:after {
        right: 50%;
      }
    }
  }
}

.cat-lower-wrap {
  height: 90%;
  width: 100%;
  position: absolute;
  top: 100%;
  width: 75px;
  left: calc(50% - 37.5px);
  animation: reverse-swing $duration .2s infinite both; // cancel swing
  transform-origin: top center;
}

.cat-lower {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  animation: swing $duration .5s infinite both;
  transform-origin: top center;
  
  &:after {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: 100px;
    background-image: radial-gradient(circle at 10px 50px,
      white,
      white 40%,
      $color-fur-light 65%,
      $color-fur-dark);
    z-index: 1;
  }
  
  .cat-leg, .cat-paw {
    z-index: -1;
    position: absolute;
    height: 20px;
    width: 20px;
    animation: swing-leg $duration .3s infinite both;
    z-index: 1;
    transform-origin: top center;
    border-top-left-radius: 20px;
    border-top-right-radius: 20px;
    background-image: linear-gradient(to right,
      white,
      $color-fur-light,
      $color-fur-dark);
  }
  
  > .cat-leg {
    bottom: 20px;
    
    .cat-leg {
      top: 25%;
    }
    
    + .cat-leg {
      right: 0;
    }
  }
  
  .cat-paw {
    top: 50%;
    border-radius: 50%;
    background-color: #fff;
  }
  
  .cat-tail {
    position: absolute;
    height: 15px;
    width: 10px;
    animation: swing-tail $duration $easing infinite both;
    transform-origin: top center;
    z-index: 0;
    background-image: linear-gradient(to right,
      white,
      $color-fur-light,
      $color-fur-dark);
    border-bottom-left-radius: 10px;
    border-bottom-right-radius: 10px;
    
    > .cat-tail {
      top: 50%;
    }
  }
  
  > .cat-tail {
    left: calc(50% - 5px);
    top: 95%;
  }
}

.cat-head {
  width: 90px;
  height: 90px;
  background-image: radial-gradient(circle at 10px 10px,
    white,
    white 40%,
    $color-fur-light 65%,
    $color-fur-dark);
  border-radius: 50%;
  top: calc(100% - 45px);
}

.cat-face {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 100%;
  animation: face $duration $easing infinite both;
  transform-style: preserve-3d;
  perspective: 100px;
}

.cat-ears {
  position: absolute;
  top: 0;
  left: 0;
  height: 50%;
  width: 100%;
  z-index: -1;
}

.cat-ear {
  width: 20px;
  height: 100%;
  position: absolute;
  border-radius: 5px;
  top: -10px;
  
  &:first-child {
    left: 0;
    transform-origin: top left;
    transform: skewY(40deg);
    background-color: white;
    
    &:before {
      left: 0;
      border-top-right-radius: 50%;
      border-bottom-right-radius: 50%;
      background-color: #D7EBFB;
    }
  }
  
  &:last-child {
    right: 0;
    transform-origin: top right;
    transform: skewY(-40deg);
    background-color: darken($color-fur-light, 1%);
    
    &:before {
      right: 0;
      border-top-left-radius: 50%;
      border-bottom-left-radius: 50%;
      background-color: lighten(#D7EBFB, 2%);
    }
  }
  
  &:before {
    width: 60%;
    height: 100%;
    top: 10px;
    position: absolute;
    background-color: #fff;
  }
}

.cat-eyes {
  position: absolute;
  top: 50%;
  width: 100%;
  height: 6px;
  animation: blink $duration step-end infinite both;
  
  &:before, &:after {
    position: absolute;
    height: 6px;
    width: 6px;
    border-radius: 50%;
    background-color: $color-features;
  }
  &:before {
    left: 20px;
  }
  &:after {
    right: 20px;
  }
}

.cat-mouth {
  position: absolute;
  width: 12px;
  height: 8px;
  background-color: $color-features;
  top: 60%;
  left: calc(50% - 6px);
  border-top-left-radius: 50% 30%;
  border-top-right-radius: 50% 30%;
  border-bottom-left-radius: 50% 70%;
  border-bottom-right-radius: 50% 70%;
  transform: translateZ(10px);
  
  &:before, &:after {
    position: absolute;
    width: 90%;
    height: 100%;
    border: 2px solid $color-features-light;
    top: 80%;
    border-radius: 100px;
    border-top-color: transparent;
    z-index: -1;
  }
  &:before {
    border-left-color: transparent;
    right: calc(50% - 1px);
    transform-origin: top right;
    transform: rotate(10deg);
  }
  &:after {
    border-right-color: transparent;
    left: calc(50% - 1px);
    transform-origin: top left;
    transform: rotate(-10deg);
  }
}

.cat-whiskers {
  width: 50%;
  height: 8px;
  position: absolute;
  bottom: 25%;
  left: 25%;
  transform-style: preserve-3d;
  perspective: 60px;
  
  &:before, &:after {
    position: absolute;
    height: 100%;
    width: 30%;
    border: 2px solid $color-features-light;
    border-left: none;
    border-right: none;
  }
  &:before {
    right: 100%;
    transform-origin: right center;
    transform: rotateY(70deg) rotateZ(-10deg);
  }
  &:after {
    left: 100%;
    transform-origin: left center;
    transform: rotateY(-70deg) rotateZ(10deg);
  }
}

@function swing-rotate($val) {
  @return rotate($val * 1deg);
}
@function swing-face($val) {
  @return translateX($val * 1px);
}

@mixin swing($mult: 1, $fn: swing-rotate) {  
  @for $i from 1 through $total-swings {
    $swing: nth($swings, $i);
    $kfr: ($i - 1) / ($total-swings - 1);
    
    #{percentage($kfr)} {
      transform: call($fn, $swing * $mult);
    }
  }
}

@keyframes bob {
  $down: true;
  @for $i from 1 through $total-swings * 2 - 1 {
    // $swing: nth($swings, $i);
    $kfr: ($i - 1) / ($total-swings * 2 - 1 - 1);
    $delta: .4rem;
    $distance: $delta;
    @if ($down) {
      $down: false;
      $distance: $delta;
    } @else {
      $down: true;
      $distance: -$delta;
    }
    
    #{percentage($kfr)} {
      transform: translateY($distance);
    }
  }
}

@keyframes swing {
  @include swing();
}

@keyframes swing-leg {
  @include swing(.1);
}

@keyframes swing-tail {
  @include swing(-.4);
}

@keyframes reverse-swing {
  @include swing(-1);
}

@keyframes face {
  @include swing(-.5, swing-face);
}

@keyframes fade-in {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes blink {
  from, to, 10%, 25%, 80% {
    transform: scaleY(1);
  }
  8%, 23%, 78% {
    transform: scaleY(0.1);
  }
}

body, html {
  height: 100%;
  width: 100%;
  margin: 0;
  padding: 0;
  background-color: $color-bg;
  overflow: hidden;
}

*, *:before, *:after {
  box-sizing: border-box;
  position: relative;
  animation-timing-function: $easing;
  animation-fill-mode: both;
}

*:before, *:after {
  content: '';
  display: block;
}
              
            
!

JS

              
                
              
            
!
999px

Console