<div class="snowflakes" aria-hidden="true">
  <div class="snowflake">
    <div class="inner">❅</div>
  </div>
  <div class="snowflake">
    <div class="inner">❅</div>
  </div>
  <div class="snowflake">
    <div class="inner">❅</div>
  </div>
  <div class="snowflake">
    <div class="inner">❅</div>
  </div>
  <div class="snowflake">
    <div class="inner">❅</div>
  </div>
  <div class="snowflake">
    <div class="inner">❅</div>
  </div>
  <div class="snowflake">
    <div class="inner">❅</div>
  </div>
  <div class="snowflake">
    <div class="inner">❅</div>
  </div>
  <div class="snowflake">
    <div class="inner">❅</div>
  </div>
  <div class="snowflake">
    <div class="inner">❅</div>
  </div>
  <div class="snowflake">
    <div class="inner">❅</div>
  </div>
  <div class="snowflake">
    <div class="inner">❅</div>
  </div>
</div>

<style>
  .snowflake {
    color: rgb(202, 211, 245);
    font-size: 1em;
    font-family: Arial, sans-serif;
    text-shadow: 0 0 1px #000;
  }

  .snowflake,
  .snowflake .inner {
    animation-iteration-count: infinite;
    animation-play-state: running;
  }

  @keyframes snowflakes-fall {
    0% {
      transform: translateY(0);
    }
    100% {
      transform: translateY(110vh);
    }
  }

  @keyframes snowflakes-shake {
    0%,
    100% {
      transform: translateX(0);
    }
    50% {
      transform: translateX(80px);
    }
  }

  .snowflake {
    position: fixed;
    top: -10%;
    z-index: 9999;
    -webkit-user-select: none;
    user-select: none;
    cursor: default;
    animation-name: snowflakes-shake;
    animation-duration: 3s;
    animation-timing-function: ease-in-out;
  }

  .snowflake .inner {
    animation-duration: 10s;
    animation-name: snowflakes-fall;
    animation-timing-function: linear;
  }

  .snowflake:nth-of-type(0) {
    left: 1%;
    animation-delay: 0s;
  }

  .snowflake:nth-of-type(0) .inner {
    animation-delay: 0s;
  }

  .snowflake:first-of-type {
    left: 10%;
    animation-delay: 1s;
  }

  .snowflake:first-of-type .inner,
  .snowflake:nth-of-type(8) .inner {
    animation-delay: 1s;
  }

  .snowflake:nth-of-type(2) {
    left: 20%;
    animation-delay: 0.5s;
  }

  .snowflake:nth-of-type(2) .inner,
  .snowflake:nth-of-type(6) .inner {
    animation-delay: 6s;
  }

  .snowflake:nth-of-type(3) {
    left: 30%;
    animation-delay: 2s;
  }

  .snowflake:nth-of-type(11) .inner,
  .snowflake:nth-of-type(3) .inner {
    animation-delay: 4s;
  }

  .snowflake:nth-of-type(4) {
    left: 40%;
    animation-delay: 2s;
  }

  .snowflake:nth-of-type(10) .inner,
  .snowflake:nth-of-type(4) .inner {
    animation-delay: 2s;
  }

  .snowflake:nth-of-type(5) {
    left: 50%;
    animation-delay: 3s;
  }

  .snowflake:nth-of-type(5) .inner {
    animation-delay: 8s;
  }

  .snowflake:nth-of-type(6) {
    left: 60%;
    animation-delay: 2s;
  }

  .snowflake:nth-of-type(7) {
    left: 70%;
    animation-delay: 1s;
  }

  .snowflake:nth-of-type(7) .inner {
    animation-delay: 2.5s;
  }

  .snowflake:nth-of-type(8) {
    left: 80%;
    animation-delay: 0s;
  }

  .snowflake:nth-of-type(9) {
    left: 90%;
    animation-delay: 1.5s;
  }

  .snowflake:nth-of-type(9) .inner {
    animation-delay: 3s;
  }

  .snowflake:nth-of-type(10) {
    left: 25%;
    animation-delay: 0s;
  }

  .snowflake:nth-of-type(11) {
    left: 65%;
    animation-delay: 2.5s;
  }
</style>
