CSS Loader Spinner : HTML simple

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HTML

CSS

.loader {
  position: relative;
  width: 120px;
  height: 90px;
  margin: 0 auto;
}

body{
  display:flex;
  align-items:center;
  justify-content:center;
  min-height:100vh;
  background-color:#111111;

}
.loader:before {
  content: "";
  position: absolute;
  bottom: 30px;
  left: 50px;
  height: 30px;
  width: 30px;
  border-radius: 50%;
  background: #cebebe;
  animation: loading-bounce 0.5s ease-in-out infinite alternate;
}

.loader:after {
  content: "";
  position: absolute;
  right: 0;
  top: 0;
  height: 7px;
  width: 45px;
  border-radius: 4px;
  box-shadow: 0 5px 0 #f2f2f2, -35px 50px 0 #f2f2f2, -70px 95px 0 #f2f2f2;
  animation: loading-step 1s ease-in-out infinite;
}

@keyframes loading-bounce {
  0% {
    transform: scale(1, 0.7);
  }

40% {
    transform: scale(0.8, 1.2);
  }

60% {
    transform: scale(1, 1);
  }

100% {
    bottom: 140px;
  }
}

@keyframes loading-step {
  0% {
    box-shadow: 0 10px 0 rgba(0, 0, 0, 0),
            0 10px 0 #f2f2f2,
            -35px 50px 0 #f2f2f2,
            -70px 90px 0 #f2f2f2;
  }

100% {
    box-shadow: 0 10px 0 #f2f2f2,
            -35px 50px 0 #f2f2f2,
            -70px 90px 0 #f2f2f2,
            -70px 90px 0 rgba(0, 0, 0, 0);
  }
}