.bounce {
position:fixed;
left:50%;
bottom:0;
margin-top:-25px;
margin-left:-25px;
height:50px;
width:50px;
background:red;
-webkit-animation:bounce 1s infinite;
-moz-animation:bounce 1s infinite;
-o-animation:bounce 1s infinite;
animation:bounce 1s infinite;
}
@-webkit-keyframes bounce {
0% { bottom:0px; }
50% { bottom:15px; }
100% {bottom:30;}
}
@-moz-keyframes bounce {
0% { bottom:0px; }
50% { bottom:15px; }
100% {bottom:30;}
}
@-o-keyframes bounce {
0% { bottom:0px; }
50% { bottom:15px; }
100% {bottom:30;}
}
@keyframes bounce {
0% { bottom:0px; }
50% { bottom:15px; }
100% {bottom:30;}
}
