gistfile1.html

<script>
(function(cont, meth) {
var index;

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

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

cont[meth] = function (){
  index = 10;
  iterate();
}
})(this, 'countdown');

countdown();
</script>
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