<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
*{margin: 0;padding: 0;font-size: 0}
.img{
animation-name: ani_bottom_item;
animation-duration: 4s;
390px;height:390px;
}
@-webkit-keyframes ani_bottom_item {
0% { 20px;height:20px; }
100% { 390px;height:390px;}
}
</style>
</head>
<body>
<img src="img/1.jpg" class="img">
<img src="img/2.jpg" class="img">
<img src="img/3.jpg" class="img">
<img src="img/4.jpg" class="img">
<img src="img/5.jpg" class="img">
<img src="img/1.jpg" class="img">
<img src="img/2.jpg" class="img">
<img src="img/3.jpg" class="img">
<img src="img/4.jpg" class="img">
<img src="img/5.jpg" class="img">
<img src="img/1.jpg" class="img">
<img src="img/2.jpg" class="img">
<img src="img/3.jpg" class="img">
<img src="img/4.jpg" class="img">
<img src="img/5.jpg" class="img">
<img src="img/1.jpg" class="img">
<img src="img/2.jpg" class="img">
<img src="img/3.jpg" class="img">
<img src="img/4.jpg" class="img">
<img src="img/5.jpg" class="img">
<img src="img/1.jpg" class="img">
<img src="img/2.jpg" class="img">
<img src="img/3.jpg" class="img">
<img src="img/4.jpg" class="img">
<img src="img/5.jpg" class="img">
<img src="img/1.jpg" class="img">
<img src="img/2.jpg" class="img">
<img src="img/3.jpg" class="img">
<img src="img/4.jpg" class="img">
<img src="img/5.jpg" class="img">
</body>
</html>