body.upsideDown{
    background:black;
    transform:rotate(-180deg);
    transition-duration: 2s;
    height: 100vh;
    width: 100vw;
    position: absolute;
    filter: invert(1);
  }
  .snowflakes{
    display: none;
  }
  .upsideDown .snowflakes{
    display: block;
  }
.snowflake {
    width: 0.5rem;
    height: 0.5rem;
    filter:blur(1.5px);
    border-radius: 50%;
    opacity: 0.5;
    background: black;
  }
  
  @keyframes snowflakes-fall {
      0% {
          top: -50%
      }
      100% {
          top: 100%
      }
  }
  
  @keyframes snowflakes-shake {
      0% {
          transform: translateX(0px)
      }
      50% {
          transform: translateX(80px)
      }
      100% {
          transform: translateX(0px)
      }
  }
  
  .snowflake {
      position: fixed;
      bottom: -50%;
      z-index: 9999;
      cursor: default;
      animation-name: snowflakes-fall, snowflakes-shake;
      animation-duration: 10s, 3s;
      animation-timing-function: linear, ease-in-out;
      animation-iteration-count: infinite, infinite;
      animation-play-state: running, running
  }
  
  .snowflake:nth-of-type(0) {
      left: 1%;
      -webkit-animation-delay: 0s, 0s;
      animation-delay: 0s, 0s
  }
  
  .snowflake:nth-of-type(1) {
      left: 10%;
      -webkit-animation-delay: 1s, 1s;
      animation-delay: 1s, 1s
  }
  
  .snowflake:nth-of-type(2) {
      left: 20%;
      -webkit-animation-delay: 6s, .5s;
      animation-delay: 6s, .5s
  }
  
  .snowflake:nth-of-type(3) {
      left: 30%;
      -webkit-animation-delay: 4s, 2s;
      animation-delay: 4s, 2s
  }
  
  .snowflake:nth-of-type(4) {
      left: 40%;
      -webkit-animation-delay: 2s, 2s;
      animation-delay: 2s, 2s
  }
  
  .snowflake:nth-of-type(5) {
      left: 50%;
      -webkit-animation-delay: 8s, 3s;
      animation-delay: 8s, 3s
  }
  
  .snowflake:nth-of-type(6) {
      left: 60%;
      -webkit-animation-delay: 6s, 2s;
      animation-delay: 6s, 2s
  }
  
  .snowflake:nth-of-type(7) {
      left: 70%;
      -webkit-animation-delay: 2.5s, 1s;
      animation-delay: 2.5s, 1s
  }
  
  .snowflake:nth-of-type(8) {
      left: 80%;
      -webkit-animation-delay: 1s, 0s;
      animation-delay: 1s, 0s
  }
  
  .snowflake:nth-of-type(9) {
      left: 90%;
      -webkit-animation-delay: 3s, 1.5s;
      animation-delay: 3s, 1.5s
  }