.animated{-webkit-animation-duration:.5s;animation-duration:.5s;-webkit-animation-fill-mode:both;animation-fill-mode:both}@keyframes lightbg{0%{background:url(../images/bg.jpg) no-repeat center center;background-size:cover}50%{background:url(../images/bg1.jpg) no-repeat center center;background-size:cover}100%{background:url(../images/bg.jpg) no-repeat center center;background-size:cover}}.lightbg{animation:lightbg 2s infinite ease-in-out alternate}