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HTML 

              
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    c0-37.3,30.4-67.7,67.7-67.7c3.2,0,6.4,0.2,9.5,0.7c18.1-24.6,46.5-39.4,77.5-39.4c30.9,0,59.4,14.8,77.5,39.4
    c3.1-0.5,6.3-0.7,9.6-0.7c37.3,0,67.6,30.4,67.6,67.7C480,303,449.7,333.3,412.4,333.3z" />
    </g>
    <path class="wind-three" d="M144,352H16c-8.8,0-16,7.2-16,16s7.2,16,16,16h128c8.8,0,16-7.2,16-16S152.8,352,144,352z" />
    <path class="wind-two" d="M16,320h94c8.8,0,16-7.2,16-16s-7.2-16-16-16H16c-8.8,0-16,7.2-16,16S7.2,320,16,320z" />
    <path class="wind-one" d="M16,256h64c8.8,0,16-7.2,16-16s-7.2-16-16-16H16c-8.8,0-16,7.2-16,16S7.2,256,16,256z" />
  </svg>
</div>

<p>Disclaimer: Still in beta, Webkit works fine, but Firefox has issues with transform-origin</p>
!

CSS 

              
                body {
  background: #121212;
}
p {
  color: #666;
  font-size: 12px;
  text-align: center;
}
.stage {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 600px;
  height: 96px;
  margin-left: -300px;
  margin-top: -30px;
}

svg {
  width: 48px;
  height: 48px;
  margin: 24px 0 0 40px;
  fill: #fff;
}

/* Thunder Bolt Animation */
.thunder-cloud .bolt {
  animation: flash 2s infinite;
}

@keyframes flash {
  0% {
    transform: translateY(-25px) translateX(25px) scaleY(0.95);
    opacity: 0;
  }
  5%, 25% {
    opacity: 1;
  }
  15%, 20% {
    opacity: 0;
  }
  50% {
    transform: translateY(8px) translateX(-10px);
    opacity: 1;
  }
  80% {
    transform: translateY(8px) translateX(-10px);
    opacity: 0;
  }
  100% {
    transform: translateY(-25px) translateX(25px) scaleY(0.95);
    opacity: 0;
  }
}

/* Raindrops Animation */
.rain-cloud .raindrop-one,
.rain-cloud .raindrop-two,
.rain-cloud .raindrop-three {
  opacity: 0;
  animation-timing-function: cubic-bezier(1, 0, 1, 1);
}

.rain-cloud .raindrop-one {
  animation: falling-drop-one 2s infinite;
}

.rain-cloud .raindrop-two {
  animation: falling-drop-two 1.90s infinite;
  animation-delay: 0.8s;
}

.rain-cloud .raindrop-three {
  animation: falling-drop-three 1.80s infinite;
  animation-delay: 0.5s;
}

@keyframes falling-drop-one {
  0% {
    transform: translateY(-35px);
    opacity: 0;
  }
  10% {
    transform: translateY(-15px);
    opacity: 1;
  }
  30% {
    opacity: 1;
  }
  60% {
    transform: translateY(100px);
    opacity: 0;
  }
  100% {
    transform: translateY(-35px);
    opacity: 0;
  }
}

@keyframes falling-drop-two {
  0% {
    transform: translateY(-105px);
    opacity: 0;
  }
  10% {
    transform: translateY(-85px);
    opacity: 1;
  }
  30% {
    opacity: 1;
  }
  60% {
    transform: translateY(5px);
    opacity: 0;
  }
  100% {
    transform: translateY(-105px);
    opacity: 0;
  }
}

@keyframes falling-drop-three {
  0% {
    transform: translateY(-105px);
    opacity: 0;
  }
  10% {
    transform: translateY(-85px);
    opacity: 1;
  }
  30% {
    opacity: 1;
  }
  60% {
    transform: translateY(35px);
    opacity: 0;
  }
  100% {
    transform: translateY(-105px);
    opacity: 0;
  }
}

/* Snowflake Animations */
.snow-cloud .snowflake-one,
.snow-cloud .snowflake-two,
.snow-cloud .snowflake-three {
  opacity: 0;
  transform-origin: center center;
  animation-timing-function: ease-in;
}

.snow-cloud .snowflake-one {
  animation: falling-snow-one 4s infinite;
}

.snow-cloud .snowflake-two {
  animation: falling-snow-two 3.8s infinite;
  animation-delay: 2.5s;
}

.snow-cloud .snowflake-three {
  animation: falling-snow-three 3.9s infinite;
  animation-delay: 1.5s;
}

@keyframes falling-snow-one {
  0% {
    transform: translateY(-65px) rotate(0);
    opacity: 0;
  }
  20% {
    transform: translateY(-10px) translateX(30px) rotate(-30deg);
    opacity: 1;
  }
  40% {
    transform: translateY(45px) translateX(-30px) rotate(30deg);
  }
  50% {
    opacity: 1;
  }
  60% {
    transform: translateY(100px) translateX(30px) rotate(-30deg);
    opacity: 0;
  }
  100% {
    transform: translateY(-65px);
    opacity: 0;
  }
}

@keyframes falling-snow-two {
  0% {
    transform: translateY(-75px) rotate(0);
    opacity: 0;
  }
  20% {
    transform: translateY(-45px) translateX(40px) rotate(-30deg);
    opacity: 1;
  }
  40% {
    transform: translateY(5px) translateX(-40px) rotate(30deg);
  }
  50% {
    opacity: 1;
  }
  60% {
    transform: translateY(30px) translateX(20px) rotate(-30deg);
    opacity: 0;
  }
  100% {
    transform: translateY(-75px);
    opacity: 0;
  }
}

@keyframes falling-snow-three {
  0% {
    transform: translateY(-85px) rotate(0);
    opacity: 0;
  }
  20% {
    transform: translateY(-10px) translateX(-30px) rotate(30deg);
    opacity: 1;
  }
  40% {
    transform: translateY(25px) translateX(30px) rotate(-30deg);
  }
  50% {
    opacity: 1;
  }
  60% {
    transform: translateY(60px) translateX(-30px) rotate(30deg);
    opacity: 0;
  }
  100% {
    transform: translateY(-85px);
    opacity: 0;
  }
}

/* Sunny Cloud Animations */
.sun-cloud .sun-half {
  animation: sun-grow 4s infinite cubic-bezier(0.2, 0.85, 0.4, 1.5);
  transform-origin: bottom center;
}

.sun-cloud .ray-one {
  animation: ray-show-one 4s infinite linear;
  transform-origin: center right;
}
.sun-cloud .ray-two {
  animation: ray-show-two 4s infinite linear;
  transform-origin: bottom right;
}
.sun-cloud .ray-three {
  animation: ray-show-three 4s infinite linear;
  transform-origin: bottom center;
}
.sun-cloud .ray-four {
  animation: ray-show-four 4s infinite linear;
  transform-origin: bottom left;
}
.sun-cloud .ray-five {
  animation: ray-show-five 4s infinite linear;
  transform-origin: center left;
}

@keyframes sun-grow {
  0%, 90%, 100% {
    transform: scale(0.5);
    opacity: 0;
  }
  15%, 80% {
    transform: scale(1);
    opacity: 1;
  }
}

@keyframes ray-show-one {
  0%, 15%, 80%, 100% {
    transform: scale(0.5);
    opacity: 0;
  }
  20%, 70% {
    transform: scale(1);
    opacity: 1;
  }
}

@keyframes ray-show-two {
  0%, 20%, 80%, 100% {
    transform: scale(0.5);
    opacity: 0;
  }
  25%, 70% {
    transform: scale(1);
    opacity: 1;
  }
}

@keyframes ray-show-three {
  0%, 25%, 80%, 100% {
    transform: scale(0.5);
    opacity: 0;
  }
  30%, 70% {
    transform: scale(1);
    opacity: 1;
  }
}

@keyframes ray-show-four {
  0%, 30%, 80%, 100% {
    transform: scale(0.5);
    opacity: 0;
  }
  35%, 70% {
    transform: scale(1);
    opacity: 1;
  }
}

@keyframes ray-show-five {
  0%, 35%, 80%, 100% {
    transform: scale(0.5);
    opacity: 0;
  }
  40%, 70% {
    transform: scale(1);
    opacity: 1;
  }
}

@keyframes ray-show-six {
  0%, 40%, 80%, 100% {
    transform: scale(0.5);
    opacity: 0;
  }
  45%, 70% {
    transform: scale(1);
    opacity: 1;
  }
}

@keyframes ray-show-seven {
  0%, 45%, 80%, 100% {
    transform: scale(0.5);
    opacity: 0;
  }
  50%, 70% {
    transform: scale(1);
    opacity: 1;
  }
}

@keyframes ray-show-eight {
  0%, 50%, 80%, 100% {
    transform: scale(0.5);
    opacity: 0;
  }
  55%, 70% {
    transform: scale(1);
    opacity: 1;
  }
}

/* Sunshine Animation */
/* If only using this animation be sure to grab the sun-grow and ray-show-x keyframes set above */
.sunshine .sun-full {
  animation: sun-grow 4s infinite cubic-bezier(0.2, 0.85, 0.4, 1.5);
  transform-origin: center center;
}

.sunshine .sun-ray-one {
  animation: ray-show-one 4s infinite ease-in;
  transform-origin: center right;
}

.sunshine .sun-ray-two {
  animation: ray-show-two 4s infinite ease-in;
  transform-origin: bottom right;
}

.sunshine .sun-ray-three {
  animation: ray-show-three 4s infinite ease-in;
  transform-origin: bottom center;
}

.sunshine .sun-ray-four {
  animation: ray-show-four 4s infinite ease-in;
  transform-origin: bottom left;
}

.sunshine .sun-ray-five {
  animation: ray-show-five 4s infinite ease-in;
  transform-origin: center left;
}

.sunshine .sun-ray-six {
  animation: ray-show-six 4s infinite ease-in;
  transform-origin: top left;
}

.sunshine .sun-ray-seven {
  animation: ray-show-seven 4s infinite ease-in;
  transform-origin: top center;
}

.sunshine .sun-ray-eight {
  animation: ray-show-eight 4s infinite ease-in;
  transform-origin: top right;
}

/* Windy Cloud Animation */
.windy-cloud .cloud-wrap {
  animation: bob 2s infinite cubic-bezier(0,0,.5,1.5);
}
.windy-cloud .cloud {
  animation: cloud-push 4s infinite;
  transform-origin: left center;
}
.windy-cloud .wind-one {
  animation: wind-slide-one 4s infinite;
}
.windy-cloud .wind-two {
  animation: wind-slide-two 4s infinite;
}
.windy-cloud .wind-three {
  animation: wind-slide-three 4s infinite;
}

@keyframes bob {
  0%, 100% {
    transform: translateY(10px);
  }
  50% {
    transform: translateY(-10px);
  }
}

@keyframes cloud-push {
  0%, 80%, 100% {
    transform: translateX(-120px) scale(1.2);
  }
  10%, 60% {
    transform: translateX(0) scale(1);
  }
}

@keyframes wind-slide-one {
  0%, 70%, 100% {
    transform: scaleX(0);
    opacity: 0;
  }
  10%, 60% {
    transform: scaleX(1);
    opacity: 1;
  }
}

@keyframes wind-slide-two {
  0%, 70%, 100% {
    transform: scaleX(0);
    opacity: 0;
  }
  10%, 60% {
    transform: scaleX(1);
    opacity: 1;
  }
}

@keyframes wind-slide-three {
  0%, 70%, 100% {
    transform: scaleX(0);
    opacity: 0;
  }
  10%, 60% {
    transform: scaleX(1);
    opacity: 1;
  }
}
!

JS
!
999px

Console