<div id="particle-container">
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
  <div class="particle"></div>
</div>

@keyframes rotatee {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

#particle-container {
  animation: rotatee 50s linear infinite;
  transform-origin: center center;
  height: 500px;
  width: 500px;
  margin: auto;
  overflow: hidden;
}
.particle {
  position: absolute;
  border-radius: 10px;
}

@for $i from 1 through 60 {
  @keyframes particle-animation-#{$i} {
    100% {
      transform: translate3d((random(90) * 1vw), (random(90) * 1vh), (random(100) * 1px));
    }
  }
  
  .particle:nth-child(#{$i}){
    animation: particle-animation-#{$i} 60s infinite;
    $size: random(10) + 5 + px;
    opacity: random(100)/100;
    height: $size;
    width: $size;
    animation-delay: -$i * .2s;
    transform: translate3d((random(90) * 1vw), (random(90) * 1vh), (random(100) * 1px));
    background: #f04c23;
  }
}