<!DOCTYPE html>
<html>
<head>
<title>
Pulse Animation - CSS
</title>
<style>
.element {
height: 500px;
width: 200px;
margin: 0 auto;
background-color: lime;
animation-name: stretch;
animation-duration: 4.0s;
animation-timing-function: ease-in-out;
animation-direction: reverse;
animation-iteration-count: infinite;
animation-play-state: running;
}
@keyframes stretch {
0% {
transform: scale(.5);
background-color: blue;
border-radius: 100%;
}
50% {
background-color: orange;
}
100% {
transform: scale(2.0);
background-color: green;
}
}
body,
html {
height: 100%;
}
body {
display: flex;
align-items: center;
justify-content: center;
}
</style>
</head>
<body>
<div class="element"></div>
</body>
</html>
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