.cover{           
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0);
  z-index: 9999;
  .loading{
    position: absolute;
    top: 50%;
    left: 43%;
    transform:translateY(-50%);
    width: 150px;
    height: 15px;
    
  }
  .loading span{
    display: inline-block;
    width: 10px;
    height: 10px;
    margin-right: 5px;
    border-radius: 50%;
    background: #3be8b0;
    -webkit-animation: load 1.04s ease infinite;
  }
  .loading span:nth-child(2){
    background: #1aafd0;
  }
  .loading span:nth-child(3){
    background: #6a67ce;
  }
  .loading span:nth-child(4){
    background: #ffb900;
  }
  .loading span:last-child{
    margin-right: 0px; 
  }
  @-webkit-keyframes load{
    0%{
        opacity: 1;
        transform: scale(1);
    }
    50%{
        transform: scale(0);
    }
    75%{
        transform: scale(0.5); 
    }
    100%{
        opacity: 0.5;
        transform: scale(1);
    }
  }
  .loading span:nth-child(1){
    -webkit-animation-delay:0.13s;
  }
  .loading span:nth-child(2){
    -webkit-animation-delay:0.26s;
  }
  .loading span:nth-child(3){
    -webkit-animation-delay:0.39s;
  }
  .loading span:nth-child(4){
    -webkit-animation-delay:0.52s;
  }
}