JSFiddle - React, Tailwind, and code Playground

HTML

<div>
    вапролд
    вапролдж
    вапролд
</div>

CSS

div { 
    height:400px;
    width: 400px;
    background: url(http://placekitten.com/800/800) no-repeat left top;
    -webkit-mask-position: 0 0;
-webkit-mask-size: 400px 400px;
-webkit-mask-image: -webkit-gradient(
radial, 50% 50%, 30, 50% 50%, 200, from(#fff), to(rgba(0,0,0,0)));
    
   -webkit-animation: move-background 4s infinite;
}

@-webkit-keyframes move-background {
    0% {
        background-position: left top;
    }
    50% {
        background-position: right bottom;
    }
    100% {
        background-position: left top;
    }
}