text trolling

 // Author: pahapoika91
 // Name: Text trolling
 // Description: Increases and decreases text size

<script type="text/javascript">
window.onload = function() {
 var size = 1.0
 var up = true;

 setInterval(function() {
  document.body.style.fontSize = size + "em";
  if (up)
   size += 1;
  else
   size -= 1;
  if (size == 10)
   up = false;
  if (size == 0)
   up = true;
    }, 100);
}
</script>