pxt-calliope/theme/site/elements/loader.overrides

/*******************************
         Site Overrides
*******************************/

.ui.loader:before {
   border: none;
   border-radius: 0px;
   box-shadow: none;
}

.ui.loader:after {
   border: none;
   box-shadow: none;
   border-radius: 0px;
   margin: 40px auto;
   background: transparent data-uri("static/loader.svg") no-repeat center center;
   background-size: 100%;
  -webkit-animation: loader-pxt @loaderSpeed infinite ease-in-out;
  animation: loader-pxt @loaderSpeed infinite ease-in-out;
}

@-webkit-keyframes loader-pxt {
  0% {
    -webkit-transform: perspective(160px) rotateX(0deg) rotateY(0deg);
            transform: perspective(160px) rotateX(0deg) rotateY(0deg); 
            opacity: 0}
  15% {
    -webkit-transform: perspective(160px) rotateX(0deg) rotateY(-@loaderAngle);
            transform: perspective(160px) rotateX(0deg) rotateY(-@loaderAngle); }
  50% {
    -webkit-transform: perspective(160px) rotateX(0deg) rotateY(@loaderAngle);
            transform: perspective(160px) rotateX(0deg) rotateY(@loaderAngle); 
            opacity: 1}
  100% {
    -webkit-transform: perspective(160px) rotateX(0deg) rotateY(0deg);
            transform: perspective(160px) rotateX(0deg) rotateY(0deg); 
            opacity: 0}
}

@keyframes loader-pxt {
  0% {
    -webkit-transform: perspective(160px) rotateX(0deg) rotateY(0deg);
            transform: perspective(160px) rotateX(0deg) rotateY(0deg); 
            opacity: 0}
  15% {
    -webkit-transform: perspective(160px) rotateX(0deg) rotateY(-10deg);
            transform: perspective(160px) rotateX(0deg) rotateY(-10deg); }
  50% {
    -webkit-transform: perspective(160px) rotateX(0deg) rotateY(10deg);
            transform: perspective(160px) rotateX(0deg) rotateY(10deg);
            opacity: 1}
  100% {
    -webkit-transform: perspective(160px) rotateX(0deg) rotateY(0deg);
            transform: perspective(160px) rotateX(0deg) rotateY(0deg); 
            opacity: 0}
}