.snow {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
}

.snow__layer {
    position: absolute;
    left: -100px;
    right: -100px;
    animation: wind 5s cubic-bezier(0.51, 0.01, 0.63, 0.99) infinite alternate;
    perspective: 100px;
    transform: translateX(-50px);
}

.snow__fall {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2000px;
    background: url(/bilder/snow-light.png);
    background-repeat: repeat;
    animation: fall 10s linear infinite;
}

.snow__layer:nth-child(1) {
    animation-duration: 35s;
}

.snow__layer:nth-child(1) .snow__fall {
    background: url(/bilder/snow-blur.png);
    background-repeat: repeat;
    transform: translateZ(25px);
    animation: fallblur 10s linear infinite;
}

.snow__layer:nth-child(2) .snow__fall {
    background: url(/bilder/snow-medium.png);
    background-repeat: repeat;
    animation-duration: 25s;
}

.snow__fall:nth-child(3) {
    animation-duration: 10s;
    background-size: 250px;
}

.snow__fall:nth-child(2) {
    animation-duration: 20s;
    background-size: 500px;
}

.snow__layer:nth-child(4)::before {
    animation-duration: 5s;
    transform: translateZ(50px);
    animation-name: falllight;
}

@keyframes fall {
    0% {
        transform: translateY(-1000px);
    }
}

@keyframes falllight {
    0% {
        transform: translateY(-1000px) translateZ(50px);
    }
}

@keyframes fallblur {
    0% {
        transform: translateY(-1000px) translateZ(25px);
    }
}

@keyframes wind {
    to {
        transform: translateX(50px);
    }
}

/* <div class="girlande girlande1"></div>
<div class="girlande girlande2"></div>
<div class="girlande girlande3"></div>

<div class="snow">
  <div class="snow__layer"><div class="snow__fall"></div></div>
  <div class="snow__layer"><div class="snow__fall"></div></div>
  <div class="snow__layer">
    <div class="snow__fall"></div>
    <div class="snow__fall"></div>
    <div class="snow__fall"></div>
  </div>
  <div class="snow__layer"><div class="snow__fall"></div></div>
</div> */