'hold()' - a better 'setTimeout()'

      var elem = document.getElementById("animated_element");
      var x = 0;
      while (true) {
        elem.style.left = x++;
        x %= 400;
        hold(10);
      }

• hold(x) pauses execution for ~x ms
• No callback needed
• No Animation(obj).duration(2000).checkpoint().to('width', 'auto').go(); - style tricks needed