.custom_preloader {
  width: 100%;
  height: 100%;
  left: 0;
  top: 0;
  position: fixed;
  z-index: 99999;
  background-color: #ffffff;
  background-position:center center;
  background-repeat:no-repeat;
  background-image: url('/registration_course_form/static/src/img/giphy.gif');
  background-size: 150px, 150px;
  overflow: hidden;
  display: none;
  opacity: 0.5;
}