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CSS

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HTML 

              
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    g(clip-path="url(#clip-i-8)")
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    g(clip-path="url(#clip-i-9)")
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!

CSS 

              
                * {
  box-sizing:border-box;
}

html,
body {
  padding: 0;
  margin: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.box {
  width: 100%;
  height: 100%;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  
  background: rgba(74,92,18,1);  
  background: linear-gradient(to bottom, rgba(74,92,18,1) 0%, rgba(74,92,18,1) 39%, rgba(36,43,9,1) 100%);   
}





@function randomNum($min, $max) {
  $rand: random();
  $randomNum: $min + floor($rand * (($max - $min) + 1));

  @return $randomNum;
}

// TREE

.x,
.inc,
.dec{
  display: flex;
  flex-flow: row wrap;
  align-items:center;
  justify-content: center;
  position: relative;
  z-index: 2;
}

.tree {
  width: 100%;
  height: 100%;  
  position: relative;
  
  svg path{
    fill:#fff;
  }
}

$w: 400;
$h: 400;
$n: 12;

.tree {
  max-width: $w + 0px;
  max-height: $h/2 + 0px;
  
  svg {
    animation: star_scale 3s infinite alternate ease-in-out;
  }
}

.inc {
  flex-flow: row-reverse nowrap;
}


@for $i from 1 through $n/2  {    
  .tree svg:nth-of-type(#{$i}) {
    width:  $w/$n/$i + 0px;
    height: $w/$n/$i + 0px;   
  }  
}

.tree svg {
  animation-delay: randomNum( 1, $n) + 0s;  
}





.tree .mid svg {
  width:  1.25*$w/$n + 0px;
  height: 1.25*$w/$n + 0px;   
  
}


.tree .star+.x {
  .mid svg { 
    animation: star_scale-mid 8s 0s infinite alternate ease-in-out;
    
    path {
      fill: #fff9b8;
      stroke: #fce495;
    }
  }
}


@keyframes star_scale {
  from {
    transform: scale(1);
  }
  to {
    transform: scale( randomNum(0.75, 1) );
  }
}

@keyframes star_scale-mid {
  from {
    transform: scale(1);
  }
  to {
    transform: scale( randomNum(1.25, 1.35) );
  }
}





// GLOWING

.star {
    width: 100px;
    height: 100px;
    position: absolute;
    top:10px;
    left:50%;
    margin-left: -50px;
    transform-origin: 50px 10px;
    animation: rotate 36s ease-in-out infinite;
  
    i {
      opacity: 1;
      position: absolute;
      width: 1px;
      height: 20%;
      display: block;
      top: 0%;
      left:50%;
      margin-left: -1px;

      transform-origin: 50% 50%;

      transition: all .3s ease-in-out;

      background:linear-gradient(rgba(0, 0, 0, 0) 0%, rgb(215, 249, 111) 100%);
      box-shadow: 0 0 10px rgb(215, 249, 111);

      opacity: 1;

      transform-style: preserve-3d;

      animation: anim 5s ease-in-out infinite;
    }  
}


$star-n: 15;
$rad: 360;
$deg: $rad/$n;

@for $i from 0 through $star-n - 1 {
  .star i:nth-of-type(#{$i + 1}) { 
    transform: rotateZ($deg * $i + 0deg) perspective(6px) rotateX($deg + 0deg );    
  }
}

@keyframes rotate {
  50% {
    transform:rotate($rad + 0deg) scale(3);
  }
}


// SNOW

.snowflakes {
  position: fixed;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  
  z-index: 888;
  display: block;
  
    span {
      position: absolute;
      animation: snowflake_y 10s infinite linear;
      will-change: transform;
      user-select: none;
      pointer-events: none;
     
      i {
        position: absolute;
        left: 0;
        right: 0;
        top: 0;
        bottom: 0;
       
        animation: snowflake_x 1s infinite alternate ease-in-out;
       
        &:before {
          position: absolute;
          left: 0;
          right: 0;
          top: 0;
          bottom: 0;
          content: '';
          background-size: 100% 100%; 
         
          animation: snowflake_rotation 2s infinite linear;
        }
       
     }
     
  }
  
}


$snow-w: 20;
$snow-h: $snow-w;
$snow-n: 15;


$snow-height: 100vh;
$snow-dur: 20;



@for $i from 1 through $snow-n {    
  .snowflakes span:nth-of-type(#{$i}) {
    animation-delay: random(1) + 0s;
    animation-duration: randomNum(10, 30) + 0s;
    left: random(100) + 0%;
    margin-top: -1*random(1)*$snow-w + 0px;
    width: $snow-w + 0px;
    height: $snow-w + 0px;
    z-index: 10099;
    opacity: random(1);
    
    i {
      animation-name: snowflake_x_#{$i};
      animation-delay: random(1) + 0s;
    }
  }  
}



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@for $i from 0 to length($bg-collection) {
  span:nth-of-type(#{length($bg-collection)}n+#{$i+1}) i:before {
      background-image: url( nth($bg-collection, $i+1) );
    }
}

@for $i from 1 through $snow-n { 
  @keyframes snowflake_x_#{$i} {
    from {
        transform: translateX(0px);
    }
    to {
        transform: translateX( random($snow-w) + 0px );
    }
  }
}

@keyframes snowflake_y {
  from {
    transform: translateY(0px);
  }
  to {
    transform: translateY($snow-height);
  }
}

@keyframes snowflake_rotation {
  from {
      transform: rotate(0deg);
  }
  to {
      transform: rotate($rad + 0deg);
  }
}






// LETTERS

$letter: 12;


#letter {
  position: absolute;
  z-index: 100;
  top: 1vh;
  left: 50%;
  transform:translateX(-50%);
}
.stroke {
  
  
  svg {
    width: 100%;
  }
  
  path {
    fill:none; 
    stroke:#fff;
    stroke-width: 7; 
    animation: dash $letter + 0s linear forwards infinite; 
    stroke-dasharray: 2200;
    stroke-dashoffset: 2200;
  }
}


@for $i from 1 through $letter {    
  .stroke g:nth-of-type(#{$i}) path {
    animation-delay: $i + 0s;
  }
  
  .stroke g:nth-of-type(#{$letter+1}) path {
    animation-delay: $letter+1 + 0s;
  }
}


@keyframes dash {
  0% {
    stroke-dashoffset: 2200;
  }
  100% {
    stroke-dashoffset: 0;
  }
}











// HELP

// @for $i from 1 through $n/2  {    
//   svg:nth-of-type(#{$i}) {
//     width:  2*$w/$n/($n/2 + 1 - $i) + 0px;
//     height: 2*$w/$n/($n/2 + 1 - $i) + 0px;
//   }  
// }

// @for $j from $n/2 + 1 through $n {
//   svg:nth-of-type(#{$j}) {
//     width:  2*$w/$n/($j - $n/2) + 0px;
//     height: 2*$w/$n/($j - $n/2) + 0px;
//   }
// }



// span:nth-of-type(1){
//   animation-delay: 0.772625s;
//   animation-duration: 5.89333s;
//   left: 88.29%;
//   margin-top: -14.1421px;
//   width: 10px;
//   height: 10px;
//   z-index: 10099;
//   opacity: 0.28;
// }
!

JS
!
999px

Console