```
#app{
width: 200px;
height: 300px;
background:black;
overflow: hidden;
}
@keyframes aniBlink120{from{margin-left:-60px}to{margin-left:260px}}
@-webkit-keyframes aniBlink120{from{margin-left:-60px}to{margin-left:260px}}
#app a:before{content:'';
position:absolute;
width:60px;
height:300px;
margin-top:0px;
margin-left:-260px;
overflow:hidden;
z-index:6;
background:-moz-linear-gradient(left,rgba(255,255,255,0) 0,rgba(255,255,255,0.4) 50%,rgba(255,255,255,0) 100%);
background:-webkit-gradient(linear,left top,right top,color-stop(0%,rgba(255,255,255,0)),color-stop(50%,rgba(255,255,255,0.4)),color-stop(100%,rgba(255,255,255,0)));
background:-webkit-linear-gradient(left,rgba(255,255,255,0) 0,rgba(255,255,255,0.4) 50%,rgba(255,255,255,0) 100%);
background:-o-linear-gradient(left,rgba(255,255,255,0) 0,rgba(255,255,255,0.4) 50%,rgba(255,255,255,0) 100%);-webkit-transform:skewX(-25deg);transform:skewX(-25deg)}
#app:hover a:before{
-webkit-animation:aniBlink120 .5s ease-out forwards;
-moz-animation:aniBlink120 .5s ease-out forwards;
-o-animation:aniBlink120 .5s ease-out forwards;
animation:aniBlink120 .5s ease-out forwards;
}
```
