SOURCE

<div class="stars-bg"></div>

body{
  background:#16448f;
}
.stars-bg {
    background-image: url(https://s1.hdslb.com/bfs/static/jinkela/newbie/asserts/stars.png);
    width: 960px;
    height: 360px;
    animation: stars-animation 2s steps(1) infinite;
    position: absolute;
    left: 50%;
    transform: translate(-50%,-50%);
    -ms-transform: translate(-50%,-50%);
    z-index: -1;
    transform-origin: center top;
    -ms-transform-origin: center top;
    pointer-events: none!important;
    background-repeat: no-repeat;
    will-change: background-position;
}
@keyframes stars-animation {
	0% {
	background-position:0 0
}
2.56% {
	background-position:-960px 0
}
5.13% {
	background-position:-1920px 0
}
7.69% {
	background-position:0 -360px
}
10.26% {
	background-position:-960px -360px
}
12.82% {
	background-position:-1920px -360px
}
15.38% {
	background-position:0 -720px
}
17.95% {
	background-position:-960px -720px
}
20.51% {
	background-position:-1920px -720px
}
23.08% {
	background-position:0 -1080px
}
25.64% {
	background-position:-960px -1080px
}
28.21% {
	background-position:-1920px -1080px
}
30.77% {
	background-position:0 -1440px
}
33.33% {
	background-position:-960px -1440px
}
35.90% {
	background-position:-1920px -1440px
}
38.46% {
	background-position:0 -1800px
}
41.03% {
	background-position:-960px -1800px
}
43.59% {
	background-position:-1920px -1800px
}
46.15% {
	background-position:0 -2160px
}
48.72% {
	background-position:-960px -2160px
}
51.28% {
	background-position:-1920px -2160px
}
53.85% {
	background-position:0 -2520px
}
56.41% {
	background-position:-960px -2520px
}
58.97% {
	background-position:-1920px -2520px
}
61.54% {
	background-position:0 -2880px
}
64.10% {
	background-position:-960px -2880px
}
66.67% {
	background-position:-1920px -2880px
}
69.23% {
	background-position:0 -3240px
}
71.79% {
	background-position:-960px -3240px
}
74.36% {
	background-position:-1920px -3240px
}
76.92% {
	background-position:0 -3600px
}
79.49% {
	background-position:-960px -3600px
}
82.05% {
	background-position:-1920px -3600px
}
84.62% {
	background-position:0 -3960px
}
87.18% {
	background-position:-960px -3960px
}
89.74% {
	background-position:-1920px -3960px
}
92.31% {
	background-position:0 -4320px
}
94.87% {
	background-position:-960px -4320px
}
97.44% {
	background-position:-1920px -4320px
}
100.00% {
	background-position:0 -4680px
}
}