Edit in JSFiddle

var message = 'HELLO WORLD';
var container = $('#message');
window.setInterval(function frame(){
    var _current = container.text();

    if (_current.length == message.length){
        _current = '';
    }

    container.text(message.substr(0, _current.length + 1));
}, 1000 / 10);
<span id="message"></span>
#message {
    color: #d1d1d1;
    font-weight: bold;
    font-size: 60px;
}