<h1>Blobbing Effect</h1>
<h3 class="subH">By <a href="https://codepen.io/JuanjoVlado/" target="_blank">Juanjo Rivera</a></h3>
<p class="thanks">Thanks to <a href="https://css-tricks.com/shape-blobbing-css/" target="_blank">Chris Coyier</a> and <a href="https://css-tricks.com/gooey-effect/" target="_blank">Lucas Bebber</a> for their helpful articles</p>

<section>
  <h2>CSS Filter</h2>
  <div class="container">
    <div class="obj1"></div>
    <div class="obj2"></div>
    <div class="obj1"></div>
  </div>
</section>

<section>
  <h2>SVG Filter</h2>
  <div class="blobs">
    <div class="blob">1</div>
    <div class="blob">2</div>
    <div class="blob">3</div>
  </div>
  <svg xmlns="http://www.w3.org/2000/svg" version="1.1">
    <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 30 -7" result="goo" />
        <feBlend in="SourceGraphic" in2="goo" />
      </filter>
    </defs>
  </svg>
</section>

::-webkit-scrollbar {
  width: 0;
  height: 0;
}
body {
  font-family: sans-serif;
  padding: 2em;
  color: hsl(0, 0%, 20%);
}
h1 {
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.25em;
}
h2 {
  position: relative;
}
h2::before {
  content: '';
  height: 100%;
  width: 1.5em;
  background-color: #009688;
  position: absolute;
  top: -0.15em;
  left: -0.15em;
  opacity: 0.5;
  z-index: -1;
}
h3.subH {
  text-align: center;
  margin-top: 0.2em;
}
h3.subH a {
  color: #009688;
  text-decoration: none;
}
section {
  position: relative;
  margin-top: 2em;
  box-shadow: 1px 1px 5px 1px #bfbfbf
}
p {
  text-transform: uppercase;
  font-weight: bold;
  letter-spacing: 0.1em;
  font-size: 20px;
  text-align: center;
}
p a {
  color: #009688;
}

p.thanks {
  font-size: 12px;
  text-transform: none;
}

/* CSS BLOBBING EFFECT */
.container {
  background-color: white;
  display: block;
  margin: 2em auto;
  width: 80%;
  padding: 1em;
  margin: 0 auto;
  filter: contrast(20);
}
.container div {
  height: 5em;
  width: 5em;
  background-color: black;
  border-radius: 50%;
  margin: 0 auto;
  position: relative;
  filter: blur(10px);
}
.obj2 {
  background-color: red !important;
  animation-name: move;
  animation-duration: 2.5s;
  animation-iteration-count: infinite;
  animation-timing-function: linear;
}

@keyframes move {
  25%{
    left: -60px;
    top: 0;
  }
  50%{
    left: 0;
    top: -60px;
  }
  75%{
    left: 60px;
    top: 0;
  }
  0%, 100% {
    left: 0;
    top: 60px;
  }
}

/* SVG BLOBBING EFFECT */
.blobs {
  filter: url("#goo");
}
.blob {
  background-color: black;
  border-radius: 50%;
  color: white;
  line-height: 3em;
  width: 3em;
  text-align: center;
  font-size: 2.5em;
  position: absolute;
  left: 0.5em;
}
.blob:nth-child(1) {
  z-index: 3;
}
.blob:nth-child(2) {
  z-index: 2;
  animation-name: move2;
}
.blob:nth-child(3) {
  z-index: 1;
  animation-name: move3;
}
.blob:nth-child(2),
.blob:nth-child(3) {
  animation-duration: 3s;
  animation-iteration-count: infinite;
  animation-direction: alternate;
}

@keyframes move2 {
  50%,100%{
    left: 3.75em;
  }
}

@keyframes move3 {
  50% {
    left: 3.75em;
  }
  90%, 100%{
    left: 7.5em;
  }
}