<style>

.pswp__preloader__icn {

      opacity:0.75;

      width: 24px;

      height: 24px;

      -webkit-animation: clockwise 500ms linear infinite;

      animation: clockwise 500ms linear infinite;

      margin-left: 60px;

    }

    .pswp__preloader__cut {

      position: relative;

      width: 12px;

      height: 24px;

      overflow: hidden;

      position: absolute;

      top: 0;

      left: 0;

    }

    .pswp__preloader__donut {

      box-sizing: border-box;

      width: 24px;

      height: 24px;

      border: 2px solid #000;

      border-radius: 50%;

      border-left-color: transparent;

      border-bottom-color: transparent;

      position: absolute;

      top: 0;

      left: 0;

      background: none;

      margin:0;

      -webkit-animation: donut-rotate 1000ms cubic-bezier(.4,0,.22,1) infinite;

      animation: donut-rotate 1000ms cubic-bezier(.4,0,.22,1) infinite;

    }

    @-webkit-keyframes clockwise {

      0% { -webkit-transform: rotate(0deg) }

      100% { -webkit-transform: rotate(360deg) }

    }

    @keyframes clockwise {

      0% { transform: rotate(0deg) }

      100% { transform: rotate(360deg) }

    }

    @-webkit-keyframes donut-rotate {

      0% { -webkit-transform: rotate(0) }

      50% { -webkit-transform: rotate(-140deg) }

      100% { -webkit-transform: rotate(0) }

    }

    @keyframes donut-rotate {

      0% { transform: rotate(0) }

      50% { transform: rotate(-140deg) }

      100% { transform: rotate(0) }

    }

</style>

<div class="pswp__preloader__icn">

  <div class="pswp__preloader__cut">

     <div class="pswp__preloader__donut"></div>

  </div>

</div>