div#preload {
    margin: auto;
    position: fixed;
    width: 100%;
    height: 100%;
    background-color: #fff;
    z-index: 9999999;
    display: flex;
    align-content: center;
    justify-content: center;
  }
  
  .sk-folding-cube {
    top: 50%;
    left: 50%;
    margin-left: -25px;
    margin-top: -25px;
    width: 50px;
    height: 50px;
    position: absolute;
    -webkit-transform: rotateZ(45deg);
    transform: rotateZ(45deg);
  }
  
  .sk-folding-cube .sk-cube {
    float: left;
    width: 50%;
    height: 50%;
    position: relative;
    -webkit-transform: scale(1.1);
    -ms-transform: scale(1.1);
    transform: scale(1.1);
  }
  
  .sk-folding-cube .sk-cube2 {
    -webkit-transform: scale(1.1) rotateZ(90deg);
    transform: scale(1.1) rotateZ(90deg);
  }
  
  .sk-folding-cube .sk-cube4 {
    -webkit-transform: scale(1.1) rotateZ(270deg);
    transform: scale(1.1) rotateZ(270deg);
  }
  
  .sk-folding-cube .sk-cube3 {
    -webkit-transform: scale(1.1) rotateZ(180deg);
    transform: scale(1.1) rotateZ(180deg);
  }
  
  .sk-folding-cube .sk-cube:before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    -webkit-animation: sk-foldCubeAngle 2.4s infinite linear both;
    animation: sk-foldCubeAngle 2.4s infinite linear both;
    -webkit-transform-origin: 100% 100%;
    -ms-transform-origin: 100% 100%;
    transform-origin: 100% 100%;
    background: #17a2b8;
  }
  
  .sk-folding-cube .sk-cube2:before {
    -webkit-animation-delay: 0.3s;
    animation-delay: 0.3s;
  }
  
  .sk-folding-cube .sk-cube4:before {
    -webkit-animation-delay: 0.9s;
    animation-delay: 0.9s;
  }
  
  .sk-folding-cube .sk-cube3:before {
    -webkit-animation-delay: 0.6s;
    animation-delay: 0.6s;
  }
  
  @keyframes sk-foldCubeAngle {
    0%,
    10% {
      -webkit-transform: perspective(140px) rotateX(-180deg);
      transform: perspective(140px) rotateX(-180deg);
      opacity: 0;
    }
    25%,
    75% {
      -webkit-transform: perspective(140px) rotateX(0);
      transform: perspective(140px) rotateX(0);
      opacity: 1;
    }
    100%,
    90% {
      -webkit-transform: perspective(140px) rotateY(180deg);
      transform: perspective(140px) rotateY(180deg);
      opacity: 0;
    }
  }