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              <div>
<svg xmlns="http://www.w3.org/2000/svg" version="1.1" class="goo">
  <defs>
    <filter id="goo">
      <feGaussianBlur in="SourceGraphic" stdDeviation="10" result="blur" />
      <feColorMatrix in="blur" mode="matrix" values="1 0 0 0 0  0 1 0 0 0  0 0 1 0 0  0 0 0 19 -9" result="goo" />
      <feComposite in="SourceGraphic" in2="goo"/>
    </filter>
  </defs>
</svg>

<span class="button--bubble__container">
  <a href="#campaign" class="button button--bubble">
    Hover me
  </a>
  <span class="button--bubble__effect-container">
    <span class="circle top-left"></span>
    <span class="circle top-left"></span>
    <span class="circle top-left"></span>

    <span class="button effect-button"></span>

    <span class="circle bottom-right"></span>
    <span class="circle bottom-right"></span>
    <span class="circle bottom-right"></span>
  </span>
</span>
</div>
            
          
!
            
              $dark-blue: #222;
$green: #90feb5;
$action-color: $green;

* {
  box-sizing: border-box;
}

div{
  display: block;
  height: 100%;
  animation: hue-rotate 10s linear infinite;
}

.button {
  -webkit-font-smoothing: antialiased;
  background-color: $dark-blue;
  border: none;
  color: #fff;
  display: inline-block;
  font-family: 'Montserrat', sans-serif;
  font-size: 14px;
  font-weight: 100;
  text-decoration: none;
  user-select: none;
  letter-spacing: 1px;
  color: white;
  padding: 20px 40px;
  text-transform: uppercase;
  transition: all 0.1s ease-out;

  &:hover {
    background-color: $action-color;
    color: #fff;
  }
  
  &:active {
    transform: scale(0.95);
  }

  &--bubble {
    position: relative;
    z-index: 2;
    color: white;
    background: none;

    &:hover {
      background: none;
    }

    &:hover + .button--bubble__effect-container .circle {
      background: darken($action-color, 15%);
    }

    &:hover + .button--bubble__effect-container .button {
      background: darken($action-color, 15%);
    }

    &:active + .button--bubble__effect-container {
      transform: scale(0.95);
    }

    &__container {
      position: relative;
      display: inline-block;

      .effect-button {
        position: absolute;
        width: 50%;
        height: 25%;
        top: 50%;
        left: 25%;
        z-index: 1;
        transform: translateY(-50%);
        background: $dark-blue;
        transition: background 0.1s ease-out;
      }
    }
  }
}

.button--bubble__effect-container {
  position: absolute;
  display: block;
  width: 200%;
  height: 400%;
  top: -150%;
  left: -50%;
  -webkit-filter: url("#goo");
  filter: url("#goo");
  transition: all 0.1s ease-out;
  pointer-events: none;

  .circle {
    position: absolute;
    width: 25px;
    height: 25px;
    border-radius: 15px;
    background: $dark-blue;
    transition: background 0.1s ease-out;

    &.top-left {
        top: 40%;
        left: 27%;
    }

    &.bottom-right {
        bottom: 40%;
        right: 27%;
    }
  }
}

.goo {
  position: absolute;
  visibility: hidden;
  width: 1px;
  height: 1px;
}

html, body {
  width: 100%;
  height: 100%;
  text-align: center;
}

.button--bubble__container {
  top: 50%;
  margin-top: -25px;
}

@keyframes hue-rotate {
      from {
        -webkit-filter: hue-rotate(0);
        -moz-filter: hue-rotate(0);
        -ms-filter: hue-rotate(0);
        filter: hue-rotate(0);
      }
      to {
        -webkit-filter: hue-rotate(360deg);
        -moz-filter: hue-rotate(360deg);
        -ms-filter: hue-rotate(360deg);
        filter: hue-rotate(360deg);
      }
}
            
          
!
            
              $('.button--bubble').each(function() {
  var $circlesTopLeft = $(this).parent().find('.circle.top-left');
  var $circlesBottomRight = $(this).parent().find('.circle.bottom-right');

  var tl = new TimelineLite();
  var tl2 = new TimelineLite();

  var btTl = new TimelineLite({ paused: true });

  tl.to($circlesTopLeft, 1.2, { x: -25, y: -25, scaleY: 2, ease: SlowMo.ease.config(0.1, 0.7, false) });
  tl.to($circlesTopLeft.eq(0), 0.1, { scale: 0.2, x: '+=6', y: '-=2' });
  tl.to($circlesTopLeft.eq(1), 0.1, { scaleX: 1, scaleY: 0.8, x: '-=10', y: '-=7' }, '-=0.1');
  tl.to($circlesTopLeft.eq(2), 0.1, { scale: 0.2, x: '-=15', y: '+=6' }, '-=0.1');
  tl.to($circlesTopLeft.eq(0), 1, { scale: 0, x: '-=5', y: '-=15', opacity: 0 });
  tl.to($circlesTopLeft.eq(1), 1, { scaleX: 0.4, scaleY: 0.4, x: '-=10', y: '-=10', opacity: 0 }, '-=1');
  tl.to($circlesTopLeft.eq(2), 1, { scale: 0, x: '-=15', y: '+=5', opacity: 0 }, '-=1');

  var tlBt1 = new TimelineLite();
  var tlBt2 = new TimelineLite();
  
  tlBt1.set($circlesTopLeft, { x: 0, y: 0, rotation: -45 });
  tlBt1.add(tl);

  tl2.set($circlesBottomRight, { x: 0, y: 0 });
  tl2.to($circlesBottomRight, 1.1, { x: 30, y: 30, ease: SlowMo.ease.config(0.1, 0.7, false) });
  tl2.to($circlesBottomRight.eq(0), 0.1, { scale: 0.2, x: '-=6', y: '+=3' });
  tl2.to($circlesBottomRight.eq(1), 0.1, { scale: 0.8, x: '+=7', y: '+=3' }, '-=0.1');
  tl2.to($circlesBottomRight.eq(2), 0.1, { scale: 0.2, x: '+=15', y: '-=6' }, '-=0.2');
  tl2.to($circlesBottomRight.eq(0), 1, { scale: 0, x: '+=5', y: '+=15', opacity: 0 });
  tl2.to($circlesBottomRight.eq(1), 1, { scale: 0.4, x: '+=7', y: '+=7', opacity: 0 }, '-=1');
  tl2.to($circlesBottomRight.eq(2), 1, { scale: 0, x: '+=15', y: '-=5', opacity: 0 }, '-=1');
  
  tlBt2.set($circlesBottomRight, { x: 0, y: 0, rotation: 45 });
  tlBt2.add(tl2);

  btTl.add(tlBt1);
  btTl.to($(this).parent().find('.button.effect-button'), 0.8, { scaleY: 1.1 }, 0.1);
  btTl.add(tlBt2, 0.2);
  btTl.to($(this).parent().find('.button.effect-button'), 1.8, { scale: 1, ease: Elastic.easeOut.config(1.2, 0.4) }, 1.2);

  btTl.timeScale(2.6);

  $(this).on('mouseover', function() {
    btTl.restart();
  });
});
            
          
!
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