JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://documentcloud.github.com/underscore/underscore-min.js"></script>
<script src="http://backbonejs.org/backbone-min.js"></script>
<div id='log'></div>

CSS

div#log { border-bottom: 1px solid #afafaf; width: 100%; height: 100px; overflow: scroll; background: #5f5f5f; font: 11px verdana; color: white; padding: 3px 5px; }
div#log p { margin-bottom: 2px; }

JavaScript

var log = function(txt) { $("div#log").append("<p>"+ ( typeof txt === 'string' ? txt : JSON.stringify(txt) ) +"</p>") };

    
    number = 19;
    arr = [];
    for ( i = 0; i <= number ; i++ ) {
       arr.push(i < 10 ? ("0" + i.toString()) : i.toString());
    }
    log(arr);