Animated Background Using HTML & CSS

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Hello guys today we will learn How to make animated background using HTML & CSS

First we need to create two files index.html and style.css then we need to do code for it.

Step:1

Add below code inside index.html

<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8">
	<title>Animated background</title>
	<link rel="stylesheet" type="text/css" href="style.css">
</head>
<body>
  <div class="animatedbg-outer">
      <ul class="bg-animated">
          <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>
</body>
</html>

Step:2

Then we need to add code for style.css which code i provide in below screen.

* {
  padding: 0;
  margin: 0;
}
body {
    background: #66a5ff;
    animation: bganimation 10s ease-in-out forwards;
}
@keyframes bganimation {
  0% { background: #c2d9fb; }
  15% { background: #a3c8ff; }
  50% { background: #89b7fb; }
  75% { background: #77acfb; }
  100% { background: #c2d9fb; }
}

@-webkit-keyframes bganimation {
  0% { background: #c2d9fb; }
  15% { background: #a3c8ff; }
  50% { background: #89b7fb; }
  75% { background: #77acfb; }
  100% { background: #c2d9fb; }
}
.animatedbg-outer {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: -1;
}
.bg-animated {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}
.bg-animated li {
    position: absolute;
    list-style: none;
    display: block;
    width: 40px;
    height: 40px;
    background: #303030;
    bottom: 50px;
    animation: square 25s infinite;
    -webkit-animation: square 25s infinite;
    transition-timing-function: linear;
    -webkit-transition-timing-function: linear;
    opacity: 0;
}

.bg-animated li:nth-child(1) {
    left: 4%;
    border-radius: 50%;
    background: transparent;
    border: 4px solid #303030;
}
.bg-animated li:nth-child(2) {
    left: 8%;
    width: 75px;
    height: 75px;
    -webkit-animation-delay: 2s;
            animation-delay: 2s;
    -webkit-animation-duration: 15s;
            animation-duration: 15s;
}
.bg-animated li:nth-child(3) {
    left: 20%;
    width: 175px;
    height: 175px;
    -webkit-animation-delay: 4s;
            animation-delay: 4s;
}
.bg-animated li:nth-child(4) {
    left: 45%;
    width: 90px;
    height: 90px;
    -webkit-animation-duration: 20s;
            animation-duration: 20s;
}

.bg-animated li:nth-child(5) {
    left: 75%;
    background: transparent;
    border:4px solid #303030;
}

.bg-animated li:nth-child(6) {
    left: 90%;
    width: 90px;
    height: 90px;
    -webkit-animation-delay: 3s;
            animation-delay: 3s;
    border-radius: 50%;
    background: transparent;
    border: 4px solid #303030;        
}
.bg-animated li:nth-child(7) {
    left: 35%;
    width: 60px;
    height: 60px;
    -webkit-animation-delay: 7s;
            animation-delay: 7s;
    background: transparent;
    border: 4px solid #303030;        
}
.bg-animated li:nth-child(8) {
    left: 60%;
    width: 50px;
    height: 50px;
    -webkit-animation-delay: 15s;
            animation-delay: 15s;
    -webkit-animation-duration: 40s;
            animation-duration: 40s;     
}
.bg-animated li:nth-child(9) {
    left: 35%;
    width: 140px;
    height: 140px;
    -webkit-animation-delay: 2s;
            animation-delay: 2s;
    -webkit-animation-duration: 40s;
            animation-duration: 40s;  
    border-radius: 50%;          
    background: transparent;
    border: 4px solid #303030;        
}

.bg-animated li:nth-child(10) {
    left: 95%;
    width: 60px;
    height: 60px;
    -webkit-animation-delay: 10s;
            animation-delay: 10s;        
}

.bg-animated li:nth-child(11) {
    left: 15%;
    width: 40px;
    height: 40px;
    -webkit-animation-delay: 13s;
            animation-delay: 13s;
    border-radius: 50%;        
}
.bg-animated li:nth-child(12) {
    left: 65%;
    width: 175px;
    height: 175px;
    -webkit-animation-delay: 7s;
            animation-delay: 7s;
    background: transparent;
    border: 4px solid #303030;        
}

.bg-animated li:nth-child(13) {
    left: 70%;
    width: 100px;
    height: 100px;
    -webkit-animation-delay: 8s;
            animation-delay: 8s;
    border-radius: 50%;      
}

.bg-animated li:nth-child(14) { 
    left: 70%;
    width: 100px;
    height: 100px;
    -webkit-animation-delay: 8s;
            animation-delay: 8s;
    border-radius: 50%;      
}
@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;
  }
}
@-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: 0;
  }
}

Output:

Rahul

Rahul

Web developer passionate about creating amazing user experiences.

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