gistfile1.txt

        <style>
            /* Colors */
            body {
                 background: url(http://i.imgur.com/aZty7Mq.png);
                 animation: mymove 4s linear infinite;
                 -webkit-animation: mymove 4s linear infinite;
                 -moz-animation: mymove 4s linear infinite;
            }
            @keyframes mymove {
            	0% { background-position: 0 0; }
            	50% { background-position: 40% 0; }
            }
            #dark_sun {
                position: absolute;
                width: 300px;
                height: 300px;
                top: 20%;
                left: 10%;
            }
            #sun {
                position: absolute;
                width: 300px;
                height: 300px;
                top: 20%;
                left: 10%;
            }
        </style>