.g-snows {
  position: relative;
  z-index: 9999;
}
.g-snows > li {
  opacity: 0;
  position: fixed;
  top: 0;
  border-radius: 100%;
  background-color: #fff;
  background-repeat: no-repeat;
  background-size: 100% auto !important;
  animation-name: snow-drop;
  animation-iteration-count: infinite;
  animation-timing-function: linear;
  animation-fill-mode: forwards;
  background: url(https://www.thegioididong.com/Content/newYear2020/leaf-v2.png);
}
.g-snows > li:nth-child(1) {
  left: 17%;
  width: 7px;
  height: 7px;
  animation-duration: 7606ms;
  animation-delay: 799ms;
}
.g-snows > li:nth-child(2) {
  left: 26%;
  width: 1px;
  height: 1px;
  animation-duration: 8168ms;
  animation-delay: 2786ms;
}
.g-snows > li:nth-child(3) {
  left: 39%;
  width: 9px;
  height: 9px;
  animation-duration: 10347ms;
  animation-delay: 4057ms;
}
.g-snows > li:nth-child(4) {
  left: 54%;
  width: 2px;
  height: 2px;
  animation-duration: 8869ms;
  animation-delay: 3447ms;
}
.g-snows > li:nth-child(5) {
  left: 66%;
  width: 12px;
  height: 12px;
  animation-duration: 10346ms;
  animation-delay: 3012ms;
}
.g-snows > li:nth-child(6) {
  left: 81%;
  width: 5px;
  height: 5px;
  animation-duration: 5360ms;
  animation-delay: 2400ms;
}
.g-snows > li:nth-child(7) {
  left: 97%;
  width: 7px;
  height: 7px;
  animation-duration: 7269ms;
  animation-delay: 634ms;
}
.g-snows > li:nth-child(4n) {
  width: 14px;
  height: 14px;
  background-position: -31px 0;
}
.g-snows > li:nth-child(4n + 1) {
  width: 16px;
  height: 16px;
  background-position: 0 -23px;
}
.g-snows > li:nth-child(4n + 2) {
  width: 13px;
  height: 13px;
  background-position: 0 -50px;
}
.g-snows > li:nth-child(4n + 3) {
  width: 15px;
  height: 15px;
  background-position: -49px -35px;
}
@keyframes snow-drop {
  0% {
    transform: translate(0, 0);
    opacity: 0.5;
    margin-left: 0;
  }
  10% {
    margin-left: 15px;
  }
  20% {
    margin-left: 20px;
  }
  25% {
    transform: translate(0, 166.66667px);
    opacity: 0.75;
  }
  30% {
    margin-left: 15px;
  }
  40% {
    margin-left: 0;
  }
  50% {
    transform: translate(0, 466.66667px);
    opacity: 1;
    margin-left: -15px;
  }
  60% {
    margin-left: -20px;
  }
  70% {
    margin-left: -15px;
  }
  75% {
    transform: translate(0, 800px);
    opacity: 0.5;
  }
  80% {
    margin-left: 0;
  }
  100% {
    transform: translate(0, 1000px);
    opacity: 0;
  }
}