There are <span class="time-left">10</span> seconds left. <% $(function() { var timeLeft = parseInt($('.time-left').text()); function tick() { if (--timeLeft === 0) { story.show('World End'); } else { $('.time-left').text(timeLeft); } _.delay(tick, 1000); } /* Start ticking. */ _.delay(tick, 1000); }); %>The world ended.