Cho vào footer_end

<div class="star"></div>
<div class="bg_header_left"></div>
<div class="bg_header_right"></div>
<style>
.bg_header_left {
width: 190px;
height: 620px;
background: url(http://svlamnghiep.com/images/banner_header_left.png) no-repeat;
position: fixed;
left: 0;
top: 0;
z-index: 0;
}
.bg_header_right {
width: 190px;
height: 620px;
background: url(http://svlamnghiep.com/images/banner_header_right.png) no-repeat;
position: fixed;
right: 0;
top: 0;
z-index: 0;
}
.star {
width: 100%;
height: 1000px;
background: url(http://svlamnghiep.com/images/star.png) repeat 100% 100%;
position: fixed;
left: 0;
top: 0;
z-index: -1;
-webkit-animation: animate-cloud 900s linear infinite;
-moz-animation: animate-cloud 900s linear infinite;
-ms-animation: animate-cloud 900s linear infinite;
-o-animation: animate-cloud 900s linear infinite;
animation: animate-cloud 900s linear infinite;
}</style>