*,*:before,*:after{animation:a 3s linear 1e3;background:radial-gradient(#fff,#6684 9%)0 0/3em 3em;content:"";margin:0;position:fixed;width:100%;height:100%}*:before{animation-duration:2s}*:after{animation-duration:1s}@keyframes a{to{background-position:3em 9em}}

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