gistfile1.js

(function(container){
  
  var index;
  
	function log(){
	  console.log(index);
	}

	function iterate(){
	  log();
	  if(index>1) setTimeout(iterate, 1000);
	  index--;
	}

	function countdown(){
	  index = 10;
	  iterate();
	}

	return container.countdown = countdown;

})(this);