html {
  height: 100%;
}

body {
  height: 100%;
  background-image: 
   linear-gradient(
      to bottom in lch decreasing hue, 
      lch(36% 95 281) 0%, 
      lab(99% -148 -61) 100%
    );
}

.svg-snowscene {
  width: 100%;
  height: 50%;
}

circle {
  fill: #fff; 
  animation-name: snowing;
  animation-duration: 3s;
  animation-iteration-count: infinite;
  animation-timing-function: ease-out;
  &:nth-child(2n){
    animation-delay: 1.5s;
  }
  &:nth-child(3n){
    animation-delay: 2.3s;
    animation-duration: 3.3s;
  }
  &:nth-child(4n){
    animation-delay: 0.8s;
    animation-duration: 3.2s;
  }
  &:nth-child(5n){
    animation-delay: 2.8s;
  }
}

@keyframes snowing {
  0%{ fill-opacity: 1; }
  100% { 
    fill-opacity: 0;
    transform: translateY(100%);
  }
}

const getRandom = (min, max) => {
  return Math.random() * (max - min) + min;
}

const letItSnow = () => {
  const snowflakes = document.querySelectorAll('circle');
  snowflakes.forEach((snowflake) => {
    snowflake.setAttribute('cx', getRandom(1,100) + '%');
    snowflake.setAttribute('cy', '-' + getRandom(1,100));
    snowflake.setAttribute('r', getRandom(1,3));
  })
};

letItSnow();