File: css/loader.css

#loader-div {
    text-align: center;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #272822;
    position: absolute;
    z-index: 99999;
    transition: opacity 1s linear;
}
.animated {
    -webkit-animation-duration: 5s;
    animation-duration: 5s;
    -webkit-animation-fill-mode: both;
    animation-fill-mode: both;
    -webkit-animation-timing-function: linear;
    animation-timing-function: linear;
    animation-iteration-count: infinite;
    -webkit-animation-iteration-count: infinite;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}
@-webkit-keyframes pulse {
    0% {
        height: 480px;
        width: 640px;
   }
   50% {
       height: 96px;
       width: 128px;
  }
  100% {
      height: 480x;
      width: 640px;
 }
}
@keyframes pulse {
    0% {
        height: 480x;
        width: 640px;
   }
   50% {
       height: 96px;
       width: 128px;
  }
  100% {
      height: 480x;
      width: 640px;
 }
}
.pulse {
    -webkit-animation-name: pulse;
    animation-name: pulse;
}