<div class="marquee visual-aid">
	<span>A marquee made with CSS3 and &lt;3!</span>
</div>

.visual-aid {
	/* Styles for visual aid. */
	font-size: 4em;
	height: 1.2em;
	background: #CCCCCC;
	width: 50%;
	margin: 20px auto;
	position: relative;
}

.marquee {
	overflow: hidden;
}
.marquee > * {
	white-space: nowrap;
	position: absolute;
	animation: marquee 10s linear 0s infinite;
}

@keyframes marquee {
	0% {
		left: 100%;
		transform: translateX(0%);
	}
	100% {
		left: 0%;
		transform: translateX(-100%);
	}
}