.loader-four {
  position: relative;
  display: inline-block;
  vertical-align: middle;
  width: 100px;
  height: 100px;
  margin: 20px 0
}

.loader-four__preloader {
  display: block;
  position: relative;
  left: 50%;
  top: 50%;
  width: 150px;
  height: 150px;
  margin: -75px 0 0 -75px;
  border-radius: 50%;
  border: 3px solid transparent;
  border-top-color: #9370DB;
  -webkit-animation: spin 2s linear infinite;
  animation: spin 2s linear infinite;
}

.loader-four__preloader:before {
  content: "";
  position: absolute;
  top: 5px;
  left: 5px;
  right: 5px;
  bottom: 5px;
  border-radius: 50%;
  border: 3px solid transparent;
  border-top-color: #BA55D3;
  -webkit-animation: spin 3s linear infinite;
  animation: spin 3s linear infinite;
}

.loader-four__preloader:after {
  content: "";
  position: absolute;
  top: 15px;
  left: 15px;
  right: 15px;
  bottom: 15px;
  border-radius: 50%;
  border: 3px solid transparent;
  border-top-color: #FF00FF;
  -webkit-animation: spin 1.5s linear infinite;
  animation: spin 1.5s linear infinite;
}

@-webkit-keyframes spin {
  0% {
    -webkit-transform: rotate(0deg);
    -ms-transform: rotate(0deg);
    transform: rotate(0deg);
  }
  100% {
    -webkit-transform: rotate(360deg);
    -ms-transform: rotate(360deg);
    transform: rotate(360deg);
  }
}

@keyframes spin {
  0% {
    -webkit-transform: rotate(0deg);
    -ms-transform: rotate(0deg);
    transform: rotate(0deg);
  }
  100% {
    -webkit-transform: rotate(360deg);
    -ms-transform: rotate(360deg);
    transform: rotate(360deg);
  }
}