setInterval

by Fairlight

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/console.js/0.0.2/console.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jq-console/2.7.7/jqconsole.min.js"></script>

JavaScript

var count = 0;
  var countup = function(){
    console.log(count++);
  } 
  setInterval(countup, 1000);