SOURCE

<div id="box" class="blobs">
  <div class="i">
  </div>
  <div class="i">
  </div>
  <div class="i">
  </div>
</div>
<svg xmlns="http://www.w3.org/2000/svg" version="1.1">
  <defs>
    <filter id="goo">
      <feGaussianBlur in="SourceGraphic" stdDeviation="17" 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 18 -7"
      result="goo" />
      <feBlend in="SourceGraphic" in2="goo" />
    </filter>
  </defs>
</svg>

html,
body,
div,
dl,
dt,
dd,
ul,
ol,
li,
p,
h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0;
  padding: 0;
}

html,
body {
  width: 100%;
  height: 100%;
}

#box {
  position: fixed;
  left: calc(50% - 25px);
  top: calc(50% - 25px);
  width: 50px;
  height: 50px;
  animation: loading 2s infinite alternate cubic-bezier(0.77, 0, 0.175, 1);
}

#box .i {
  position: absolute;
  left: 0;
  top: 0;
  display: block;
  width: 50px;
  height: 50px;
  background: #03a9f4;
  border-radius: 100%;
  animation: loading2 2s infinite alternate cubic-bezier(0.77, 0, 0.175, 1);
}

#box .i:nth-child(1) {
  transform: translate(0, -40px);
}

#box .i:nth-child(2) {
  transform: translate(-40px, 40px);
}

#box .i:nth-child(3) {
  transform: translate(40px, 40px);
}

.blobs {
  filter: url("#goo");
}

@keyframes loading {
  form {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(720deg);
  }
}

@keyframes loading2 {
  0% {
    background: #03a9f4;
  }
  50% {
    background: #ffeb3b;
  }
  100% {
    transform: translateX(0);
    background: #8bc34a;
  }
}