Edit in JSFiddle

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

body {margin:20px;}
#preloader_1{
		position:relative;
		}
		#preloader_1 span{
			display:block;
			bottom:0px;
			width: 9px;
			height: 5px;
			background:#9b59b6;
			position:absolute;
			animation: preloader_1 1.5s  infinite ease-in-out;
			-webkit-animation: preloader_1 1.5s  infinite ease-in-out;
			-moz-animation: preloader_1 1.5s  infinite ease-in-out;
			-ms-animation: preloader_1 1.5s  infinite ease-in-out;
			-o-animation: preloader_1 1.5s  infinite ease-in-out;
		}
		#preloader_1 span:nth-child(2){
		left:11px;
		-webkit-animation-delay: .2s;
		-moz-animation-delay: .2s;
		-ms-animation-delay: .2s;
		-o-animation-delay: .2s;
		animation-delay: .2s;
		}
		#preloader_1 span:nth-child(3){
		left:22px;
		-webkit-animation-delay: .4s;
		-moz-animation-delay: .4s;
		-ms-animation-delay: .4s;
		-o-animation-delay: .4s;
		animation-delay: .4s;
		}
		#preloader_1 span:nth-child(4){
		left:33px;
		-webkit-animation-delay: .6s;
		-moz-animation-delay: .6s;
		-ms-animation-delay: .6s;
		-o-animation-delay: .6s;
		animation-delay: .6s;
		}
		#preloader_1 span:nth-child(5){
		left:44px;
		-webkit-animation-delay: .8s;
		-moz-animation-delay: .8s;
		-ms-animation-delay: .8s;
		-o-animation-delay: .8s;
		animation-delay: .8s;
		}
		@keyframes preloader_1 {
			0% {height:5px;transform:translateY(0px); -webkit-transform:translateY(0px); background:#9b59b6;}
			25% {height:30px;transform:translateY(15px); -webkit-transform:translateY(15px); background:#3498db;}
			50% {height:5px;transform:translateY(0px); -webkit-transform:translateY(0px); background:#9b59b6;}
			100% {height:5px;transform:translateY(0px); -webkit-transform:translateY(0px); background:#9b59b6;}
		}
		@-webkit-keyframes preloader_1 {
			0% {height:5px;transform:translateY(0px); -webkit-transform:translateY(0px); background:#9b59b6;}
			25% {height:30px;transform:translateY(15px); -webkit-transform:translateY(15px); background:#3498db;}
			50% {height:5px;transform:translateY(0px); -webkit-transform:translateY(0px); background:#9b59b6;}
			100% {height:5px;transform:translateY(0px); -webkit-transform:translateY(0px); background:#9b59b6;}
		}
		@-o-keyframes preloader_1 {
			0% {height:5px;transform:translateY(0px); -webkit-transform:translateY(0px); background:#9b59b6;}
			25% {height:30px;transform:translateY(15px); -webkit-transform:translateY(15px); background:#3498db;}
			50% {height:5px;transform:translateY(0px); -webkit-transform:translateY(0px); background:#9b59b6;}
			100% {height:5px;transform:translateY(0px); -webkit-transform:translateY(0px); background:#9b59b6;}
		}
		@-moz-keyframes preloader_1 {
			0% {height:5px;transform:translateY(0px); -webkit-transform:translateY(0px); background:#9b59b6;}
			25% {height:30px;transform:translateY(15px); -webkit-transform:translateY(15px); background:#3498db;}
			50% {height:5px;transform:translateY(0px); -webkit-transform:translateY(0px); background:#9b59b6;}
			100% {height:5px;transform:translateY(0px); -webkit-transform:translateY(0px); background:#9b59b6;}
		}