.aln{animation:mymove 5s infinite}@keyframes mymove{0%{top:0px}50%{top:20px}100%{top:0px}}.hvimage1{animation:mymove1 7s infinite}@keyframes mymove1{0%{top:0px}50%{top:30px}100%{top:0px}}.hvimage2{animation:mymove2 6s infinite}@keyframes mymove2{0%{top:0px}50%{top:15px}100%{top:0px}}