[monolithed]

<style type="text/css">
div {
    border: 1px dotted #DDD;
    position: absolute;
    overflow: hidden;
    width: 200px;
    height: 50px;
}  
    
span {
    background: blue;
    position: absolute;
    color: white;
    text-align: center;
    width: 50px;
    height: 50px;
}
</style>

<script type="text/javascript">
window.onload = function(){
    var element = document.getElementsByTagName('span')[0], i = 0;
    (function(){
        element.style.left = (++i<200) ? i+'px' : i = 0;
        setTimeout(arguments.callee, 10);
    })();
};
</script>
<div>
    <span>Text</span>  
</div>