loader.css

/* From Uiverse.io by satyamchaudharydev */ 
body{
    background-color: black;
}
.spinner {
    top:  50%;
    left: 50%;
    position: fixed;
    width: 60px;
    height: 60px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
    margin-left: -75px;
    z-index: 9999;
  }
  
  .spinner span {
    position: absolute;
    top: 50%;
    left: var(--left);
    width: 35px;
    height: 7px;
    background: #ffff;
    animation: dominos 1s ease infinite;
    box-shadow: 2px 2px 3px 0px black;
  }
  
  .spinner span:nth-child(1) {
    --left: 80px;
    animation-delay: 0.125s;
  }
  
  .spinner span:nth-child(2) {
    --left: 70px;
    animation-delay: 0.3s;
  }
  
  .spinner span:nth-child(3) {
    left: 60px;
    animation-delay: 0.425s;
  }
  
  .spinner span:nth-child(4) {
    animation-delay: 0.54s;
    left: 50px;
  }
  
  .spinner span:nth-child(5) {
    animation-delay: 0.665s;
    left: 40px;
  }
  
  .spinner span:nth-child(6) {
    animation-delay: 0.79s;
    left: 30px;
  }
  
  .spinner span:nth-child(7) {
    animation-delay: 0.915s;
    left: 20px;
  }
  
  .spinner span:nth-child(8) {
    left: 10px;
  }
  
  @keyframes dominos {
    50% {
      opacity: 0.7;
    }
  
    75% {
      -webkit-transform: rotate(90deg);
      transform: rotate(90deg);
    }
  
    80% {
      opacity: 1;
    }
  }