.circles{
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 110%;
    overflow: hidden;
  }

  .circles li{
    position: absolute;
    display: block;
    width: 20px;
    height: 20px;
    background: rgba(255, 242, 242, 0.2);
    animation: animate 25s linear infinite;
    bottom: -150px;
    z-index: 1;
  }

  .circles li:nth-child(1){
    left: 25%;
    width: 80px;
    height: 80px;
    animation-delay: 3s;
  }

  .circles li:nth-child(2){
    left: 10%;
    width: 120px;
    height: 120px;
    animation-delay: 2s;
    animation-duration: 12s;
  }

  .circles li:nth-child(3){
    left: 70%;
    width: 20px;
    height: 20px;
    animation-delay: 4s;
  }

  .circles li:nth-child(4){
    left: 40%;
    width: 60px;
    height: 60px;
    animation-delay: 0s;
    animation-duration: 8s;
  }

  .circles li:nth-child(5){
    left: 65%;
    width: 110px;
    height: 110px;
    animation-delay: 1s;
  }

  .circles li:nth-child(6){
    left: 75%;
    width: 110px;
    height: 110px;
    animation-delay: 5s;
  }

  .circles li:nth-child(7){
    left: 35%;
    width: 150px;
    height: 150px;
    animation-delay: 7s;
  }

  .circles li:nth-child(8){
    left: 50%;
    width: 25px;
    height: 25px;
    animation-delay: 9s;
    animation-duration: 45s;
  }

  .circles li:nth-child(9){
    left: 20%;
    width: 15px;
    height: 15px;
    animation-delay: 2s;
    animation-duration: 35s;
  }

  .circles li:nth-child(10){
    left: 90%;
    width: 45px;
    height: 45px;
    animation-delay: 0s;
    animation-duration: 18s;
  }
  .circles li:nth-child(11){
    left: 55%;
    width: 25px;
    height: 25px;
    animation-delay: 0s;
    animation-duration: 25s;
  }

  .circles li:nth-child(12){
    left: 25%;
    width: 15px;
    height: 15px;
    animation-delay: 2s;
    animation-duration: 12s;
  }

  .circles li:nth-child(13){
    left: 2%;
    width: 110px;
    height: 110px;
    animation-delay: 1s;
    animation-duration: 11s;
  }
  .circles li:nth-child(14){
    left: 32%;
    width: 25px;
    height: 25px;
    animation-delay: 3s;
    animation-duration: 45s;
  }

  .circles li:nth-child(15){
    left: 15%;
    width: 15px;
    height: 15px;
    animation-delay: 2s;
    animation-duration: 12s;
  }

  .circles li:nth-child(16){
    left: 60%;
    width: 125px;
    height: 125px;
    animation-delay: 0s;
    animation-duration: 13s;
  }

  .circles li:nth-child(17){
    left: 30%;
    width: 135px;
    height: 135px;
    animation-delay: 1s;
  }

  .circles li:nth-child(18){
    left: 50%;
    width: 25px;
    height: 25px;
    animation-delay: 0s;
    animation-duration: 45s;
  }

  .circles li:nth-child(19){
    left: 95%;
    width: 15px;
    height: 15px;
    animation-delay: 2s;
    animation-duration: 35s;
  }

  .circles li:nth-child(20){
    left: 85%;
    width: 150px;
    height: 150px;
    animation-delay: 0s;
    animation-duration: 11s;
  }
  @keyframes animate {

    0%{
        transform: translateY(0) rotate(0deg);
        opacity: 1;
        border-radius: 0;
      }

    100%{
        transform: translateY(-1200px) rotate(360deg);
        opacity: 0;
        border-radius: 70%;
        }

    }

    @media screen and (max-width: 700px) {
      .circles {   
        visibility: hidden;
      }
    }