stars

<style>

body:before {

content: " ";

height: 100vh;

width: 100vw;

display: block;

position: fixed; 

top: 0; 

left: 0; 

z-index: 100;

background-image: url('https://i.pinimg.com/originals/2e/b9/ce/2eb9ce82d8b118a9e5c7197d10453cdf.gif');

background-size: cover;

background-repeat: no-repeat;

background-position:center;

animation: yourAnimation loop ease 0s 1 normal forwards;

pointer-events: none;