JSFiddle - React, Tailwind, and code Playground

HTML

<div id="counter"></div>
  <div class="desc">
    <div>Days</div>
    <div>Hours</div>
    <div>Minutes</div>
    <div>Seconds</div>
  </div>

JavaScript

jQuery.fn.countdown = function(userOptions)
{
  // Default options
  var options = {
    stepTime: 60,
    // startTime and format MUST follow the same format.
    // also you cannot specify a format unordered (e.g. hh:ss:mm is wrong)
    format: "dd:hh:mm:ss",
    startTime: "01:12:32:55",
    digitImages: 6,
    digitWidth: 53,
    digitHeight: 77,
    timerEnd: function(){},
    image: "http://jquery-countdown.googlecode.com/svn/trunk/img/digits.png"
  };
  var digits = [], interval;

  // Draw digits in given container
  var createDigits = function(where) 
  {
    var c = 0;
    // Iterate each startTime digit, if it is not a digit
    // we'll asume that it's a separator
    for (var i = 0; i < options.startTime.length; i++)
    {
      if (parseInt(options.startTime[i]) >= 0) 
      {
        elem = $('<div id="cnt_' + i + '" class="cntDigit" />').css({
          height: options.digitHeight * options.digitImages * 10, 
          float: 'left', background: 'url(\'' + options.image + '\')',
          width: options.digitWidth});
        digits.push(elem);
        margin(c, -((parseInt(options.startTime[i]) * options.digitHeight *
                              options.digitImages)));
        digits[c].__max = 9;
        // Add max digits, for example, first digit of minutes (mm) has 
        // a max of 5. Conditional max is used when the left digit has reach
        // the max. For example second "hours" digit has a conditional max of 4 
        switch (options.format[i]) {
          case 'h':
            digits[c].__max = (c % 2 == 0) ? 2: 9;
            if (c % 2 == 0)
              digits[c].__condmax = 4;
            break;
          case 'd': 
            digits[c].__max = 9;
            break;
          case 'm':
          case 's':
            digits[c].__max = (c % 2 == 0) ? 5: 9;
        }
        ++c;
      }
      else 
        elem = $('<div class="cntSeparator"/>').css({float: 'left'})
                .text(options.startTime[i]);

     ...