#radial {
    position:absolute;top:0px;left:0px;z-index:-2;
    height: 100%;
    width: 100%;
    background: black;   
    background: -webkit-radial-gradient(black, blue, black);
    background: -o-radial-gradient(black,blue, black);
    background: -moz-radial-gradient(black, blue, black);
    background: radial-gradient(black, blue, black);
    overflow:hidden;

 background-size: 600% 100%;

-webkit-animation: navbar 17s ease infinite;

animation: navbar 17s ease infinite;

}
@-webkit-keyframes navbar {
     0%{background-position:0% 50%}
     50%{background-position:100% 50%}
     100%{background-position:0% 50%}
 }

@keyframes navbar {
     0%{background-position:0% 50%}
     50%{background-position:100% 50%}
     100%{background-position:0% 50%}
 }