.loader { width:64px; height:64px; }
 
/* Initial state */
.bar {
    background-color:#99aaca; border:1px solid #96a6c9; float:left;
    margin-right:4px; margin-top:6px; width:6px; height:18px;
    
    /* Set the animation properties */
    animation-duration: 1s;
    animation-iteration-count: infinite;
    animation-name: loadingbar;
}
 
/* Delay both the second and third bar at the start */
.loader .bar:nth-child(2) { animation-delay: 0.1s; }
.loader .bar:nth-child(3) { animation-delay: 0.2s; }
 
/* The actual animation */
@keyframes loadingbar {
     0% { }
    10% { margin-top:5px; height:22px; border-color:#d1d8e6; background-color:#bac5db; }
    20% { margin-top:0px; height:32px; border-color:#d1d7e2; background-color:#c6ccda; }
    30% { margin-top:1px; height:30px; border-color:#d1d8e6; background-color:#bac5db; }
    40% { margin-top:3px; height:26px; }
    50% { margin-top:5px; height:22px; }
    60% { margin-top:6px; height:18px; }
    70% { }
    /* Missing frames will cause the extra delay */
    100% { }
}