JSFiddle - React, Tailwind, and code Playground

HTML

<div id="container">
    <div id="bg"></div>
</div>

CSS

@-webkit-keyframes animate_bg {
   0% {
       -webkit-transform: translate(0em, 0em);
   }
   50% { 
       -webkit-transform: translate(-30em, 0em);
   }
   100% { 
       -webkit-transform: translate(0em, 0em);
   }
}

#container {
    width: 1920px;
    height: 1080px;
    
    position: relative;
	overflow: hidden;
}

#bg {
    width: 1920px;
    height: 1080px;
    position: absolute;
    
    background-image: url('http://farm4.staticflickr.com/3768/11633218256_30a04f01c3_o.png');

    -webkit-animation: animate_bg 140s linear infinite;
}