#logo{position:relative;float:left;width:100%;height:100%;overflow:hidden}
         
         
         #logo img{max-width:100%;height:100%}
         
         #logo:before{content:'';position:absolute;top:0;left:-100px;
                                                           
                                                           
                                                           width:70px;height:100px;background:rgba(255,255,255,0.3);
                                                           
                                                           
                                                           transform:skewX(-30deg);animation-name:slide;animation-duration:7s;animation-timing-function:ease-in-out;animation-delay:.3s;animation-iteration-count:infinite;animation-direction:alternate;
                                                           background:linear-gradient( to right,rgba(255,255,255,0.13) 0%,rgba(255,255,255,0.13) 77%,rgba(255,255,255,0.5) 92%,rgba(255,255,255,0.0) 100% )
                                                           
                                                           }
                                                           
                                                           @keyframes slide{0%{left:-100;top:0}50%{left:120px;top:0}100%{left:290px;top:0}