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              <button id="newLine">New Line!</button>
<p>Beware, loading too many lines may crash your browser. And possibly the whole universe.</p>

<ol class="game">

              @import "compass/css3";

body {
  padding: 20px;

.game {
  padding: 10px;
  margin-left: 20px;
  background: #EFEFEF;
  border-radius: 3px;
  border: 1px solid rgba(0,0,0,0.1);
  line-height: 1.4;
  font-family: Monaco, monospace;
  word-break: break-all;
  word-break: break-word;
  hyphens: auto;
              $('#newLine').on('click', function() {

// Create a new line
function newLine() {
  // Variables
  var lastLine  = $('.game > li').last(),
      lastVals  = lastLine.html().split(""), 
      arRaysult = [],
      counter   = 0;
  for (var j = lastVals.length; j > 0; j--) { 
    var current   = lastVals[j-1],
        previous  = lastVals[j-2],
        previous2 = lastVals[j-3];
    if(counter == 0){
      if(   current == previous 
         && current == previous2) { // 3 identical numbers
         counter = 3; 
      } else if(current == previous) { // 2 identical numbers
         counter = 2;
      } else { // 1 number
         counter = 1;
      arRaysult.unshift(counter + current);     
  // Turn the array into a string and remove commas
  var res = arRaysult.toString().replace(/,/g, '');
  // Append the result to the list
  $('.game').append("<li>" + res + "</li>");


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