Edit in JSFiddle

<div id="preloader_1">
            <span></span>
            <span></span>
            <span></span>
            <span></span>
            <span></span>
        </div>

*{font-family: arial; font-size:14px}
p{color:#fff}
body{ background:#000;}
#preloader_1{
    position:relative;
    margin:10% 30%;
}
#preloader_1 span{
    display:block;
    bottom:0px;
    width: 9px;
    height: 5px;
    background:#9b59b6;
    position:absolute;
    -webkit-animation: preloader_1 1.5s  infinite ease-in-out;
    animation: preloader_1 1.5s  infinite ease-in-out;
}
 
#preloader_1 span:nth-child(2){
left:11px;
 -webkit-animation-delay: .2s;
animation-delay: .2s;
 
}
#preloader_1 span:nth-child(3){
left:22px;
-webkit-animation-delay: .4s;    
animation-delay: .4s;
}
#preloader_1 span:nth-child(4){
left:33px;
-webkit-animation-delay: .6s;
animation-delay: .6s;
}
#preloader_1 span:nth-child(5){
left:44px;
-webkit-animation-delay: .8s;    
animation-delay: .8s;
}
@-webkit-keyframes preloader_1 {
    0% {height:5px;transform:translateY(0px);background:#9b59b6;}
    25% {height:30px;transform:translateY(15px);background:#3498db;}
    50% {height:5px;transform:translateY(0px);background:#9b59b6;}
    100% {height:5px;transform:translateY(0px);background:#9b59b6;}
}
@keyframes preloader_1 {
    0% {height:5px;transform:translateY(0px);background:#9b59b6;}
    25% {height:30px;transform:translateY(15px);background:#3498db;}
    50% {height:5px;transform:translateY(0px);background:#9b59b6;}
    100% {height:5px;transform:translateY(0px);background:#9b59b6;}
}