CSS Box Loading Animation

HTML Code

<div class="loader">
  <div class="box1"></div>
  <div class="box2"></div>
  <div class="box3"></div>
</div>

CSS Code

.loader {
  width: 112px;
  height: 112px;
}

.box1,
.box2,
.box3 {
  border: 16px solid #f5f5f5;
  box-sizing: border-box;
  position: absolute;
  display: block;
}

.box1 {
  width: 112px;
  height: 48px;
  margin-top: 64px;
  margin-left: 0px;
  animation: abox1 4s 1s forwards ease-in-out infinite;
}

/* Visit https://democoding.in/ for more free css animation */

.box2 {
  width: 48px;
  height: 48px;
  margin-top: 0px;
  margin-left: 0px;
  animation: abox2 4s 1s forwards ease-in-out infinite;
}

.box3 {
  width: 48px;
  height: 48px;
  margin-top: 0px;
  margin-left: 64px;
  animation: abox3 4s 1s forwards ease-in-out infinite;
}

@keyframes abox1 {
  0% {
    width: 112px;
    height: 48px;
    margin-top: 64px;
    margin-left: 0px;
  }

  12.5% {
    width: 48px;
    height: 48px;
    margin-top: 64px;
    margin-left: 0px;
  }

  25% {
    width: 48px;
    height: 48px;
    margin-top: 64px;
    margin-left: 0px;
  }

  37.5% {
    width: 48px;
    height: 48px;
    margin-top: 64px;
    margin-left: 0px;
  }

  50% {
    width: 48px;
    height: 48px;
    margin-top: 64px;
    margin-left: 0px;
  }

  62.5% {
    width: 48px;
    height: 48px;
    margin-top: 64px;
    margin-left: 0px;
  }

  75% {
    width: 48px;
    height: 112px;
    margin-top: 0px;
    margin-left: 0px;
  }

  87.5% {
    width: 48px;
    height: 48px;
    margin-top: 0px;
    margin-left: 0px;
  }

  100% {
    width: 48px;
    height: 48px;
    margin-top: 0px;
    margin-left: 0px;
  }
}

@keyframes abox2 {
  0% {
    width: 48px;
    height: 48px;
    margin-top: 0px;
    margin-left: 0px;
  }

  12.5% {
    width: 48px;
    height: 48px;
    margin-top: 0px;
    margin-left: 0px;
  }

  25% {
    width: 48px;
    height: 48px;
    margin-top: 0px;
    margin-left: 0px;
  }

  37.5% {
    width: 48px;
    height: 48px;
    margin-top: 0px;
    margin-left: 0px;
  }

  50% {
    width: 112px;
    height: 48px;
    margin-top: 0px;
    margin-left: 0px;
  }

  62.5% {
    width: 48px;
    height: 48px;
    margin-top: 0px;
    margin-left: 64px;
  }

  75% {
    width: 48px;
    height: 48px;
    margin-top: 0px;
    margin-left: 64px;
  }

  87.5% {
    width: 48px;
    height: 48px;
    margin-top: 0px;
    margin-left: 64px;
  }

  100% {
    width: 48px;
    height: 48px;
    margin-top: 0px;
    margin-left: 64px;
  }
}

@keyframes abox3 {
  0% {
    width: 48px;
    height: 48px;
    margin-top: 0px;
    margin-left: 64px;
  }

  12.5% {
    width: 48px;
    height: 48px;
    margin-top: 0px;
    margin-left: 64px;
  }

  25% {
    width: 48px;
    height: 112px;
    margin-top: 0px;
    margin-left: 64px;
  }

  37.5% {
    width: 48px;
    height: 48px;
    margin-top: 64px;
    margin-left: 64px;
  }

  50% {
    width: 48px;
    height: 48px;
    margin-top: 64px;
    margin-left: 64px;
  }

  62.5% {
    width: 48px;
    height: 48px;
    margin-top: 64px;
    margin-left: 64px;
  }

  75% {
    width: 48px;
    height: 48px;
    margin-top: 64px;
    margin-left: 64px;
  }

  87.5% {
    width: 48px;
    height: 48px;
    margin-top: 64px;
    margin-left: 64px;
  }

  100% {
    width: 112px;
    height: 48px;
    margin-top: 64px;
    margin-left: 0px;
  }
}

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