*{
   	    margin: 0;
   	    padding: 0;
   	}
   	ul{
   	    list-style: none;
   	}
   	body{
   	    background: #000;
   	}
   	.demo li{
   	    float: left;
   	    width: 10%;
   	    position: relative;
   	}
   	.demo li img{
   	    width: 100%;
   	    transition:  all ease .3s;
   	    vertical-align: middle;
   	}
   	.demo:hover img {
   	    opacity: .5;
   	}
   	.demo li:hover img{
   	    opacity: 1;
   	}