Animated Background (CSS only)

animated-background-css-only.markdown

Animated Background (CSS only)

A Pen by Deven Blackburn on CodePen.

License.

index.html

<div class="animateme">
  <ul class="bg-bubbles">
    <li></li>
    <li></li>
    <li></li>
    <li></li>
    <li></li>
    <li></li>
    <li></li>
    <li></li>
    <li></li>
    <li></li>
    <li></li>
    <li></li>
    <li></li>
  </ul>
</div>

script.js

/* Nope, not today satan! */

style.scss

*{
  margin:0px;
  padding:0px;
  box-sizing: border-box;
}

body{
  background: #66a5ff;
}

.animateme {
	position: fixed;
	top: 0px;
	left: 0px;
	width: 100%;
	height: 100%;
	overflow: hidden;
	z-index: -1;
}

.bg-bubbles {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}
.bg-bubbles li {
  position: absolute;
  list-style: none;
  display: block;
  width: 40px;
  height: 40px;
  background-color: #353535;
  bottom: 60px;
  -webkit-animation: square 25s infinite;
  animation: square 25s infinite;
  -webkit-transition-timing-function: linear;
  transition-timing-function: linear;
  opacity:0;
}

.bg-bubbles li:nth-child(1) {
  left: 3%;
  border-radius:50em;
  background:transparent;
  border:4px solid #353535;
}
.bg-bubbles li:nth-child(2) {
  left: 6%;
  width: 75px;
  height: 75px;
  -webkit-animation-delay: 2s;
          animation-delay: 2s;
  -webkit-animation-duration: 17s;
          animation-duration: 17s;
}
.bg-bubbles li:nth-child(3) {
  left: 15%;
  width: 175px;
  height: 175px;
  -webkit-animation-delay: 4s;
          animation-delay: 4s;
}
.bg-bubbles li:nth-child(4) {
  left: 40%;
  width: 90px;
  height: 90px;
  -webkit-animation-duration: 22s;
          animation-duration: 22s;
}
.bg-bubbles li:nth-child(5) {
  left: 70%;
  background:transparent;
  border:4px solid #353535;
}
.bg-bubbles li:nth-child(6) {
  left: 90%;
  width: 90px;
  height: 90px;
  -webkit-animation-delay: 3s;
          animation-delay: 3s;
  border-radius:50em;
  background:transparent;
  border:4px solid #353535;
}
.bg-bubbles li:nth-child(7) {
  left: 32%;
  width: 60px;
  height: 60px;
  -webkit-animation-delay: 7s;
          animation-delay: 7s;
  background:transparent;
  border:4px solid #353535;
}
.bg-bubbles li:nth-child(8) {
  left: 55%;
  width: 50px;
  height: 50px;
  -webkit-animation-delay: 15s;
          animation-delay: 15s;
  -webkit-animation-duration: 40s;
          animation-duration: 40s;
}
.bg-bubbles li:nth-child(9) {
  left: 30%;
  width: 140px;
  height: 140px;
  -webkit-animation-delay: 2s;
          animation-delay: 2s;
  -webkit-animation-duration: 40s;
          animation-duration: 40s;
  border-radius:50em;
  background:transparent;
  border:4px solid #353535;
}
.bg-bubbles li:nth-child(10) {
  left: 90%;
  width: 60px;
  height: 60px;
  -webkit-animation-delay: 11s;
          animation-delay: 11s;
}
.bg-bubbles li:nth-child(11) {
  left: 10%;
  width: 40px;
  height: 40px;
  -webkit-animation-delay: 13s;
          animation-delay: 13s;
  border-radius:50em;
}
.bg-bubbles li:nth-child(12) {
  left: 55%;
  width: 175px;
  height: 175px;
  -webkit-animation-delay: 7s;
          animation-delay: 7s;
  background:transparent;
  border:4px solid #353535;
}

.bg-bubbles li:nth-child(13) {
  left: 65%;
  width: 100px;
  height: 100px;
  -webkit-animation-delay: 8s;
          animation-delay: 8s;
  border-radius:50em;
}

@-webkit-keyframes square {
  0% {
    -webkit-transform: translateY(0);
            transform: translateY(0);
    opacity:0;
  }
  50% {
    opacity:1;
  }
  100% {
    -webkit-transform: translateY(-700px) rotate(600deg);
            transform: translateY(-700px) rotate(600deg);
    opacity:1;
  }
}
@keyframes square {
  0% {
    -webkit-transform: translateY(0);
            transform: translateY(0);
    opacity:0;
  }
  50% {
    opacity:1;
  }
  100% {
    -webkit-transform: translateY(-700px) rotate(600deg);
            transform: translateY(-700px) rotate(600deg);
    opacity:0;
  }
}