span.snow {
    width: 50px;
    height: 50px;
    background: url(./../images/snow.png);
    background-size: cover;
    pointer-events: none;
    position: absolute;
    animation: snow 2s linear forwards;
  }
  @keyframes snow {
    0% {
      opacity: 1;
      filter: hue-rotate(0deg);
    }
    100% {
      transform: translate(50%, 1000%);
      filter: hue-rotate(360deg);
      opacity: 0;
    }
  }