Use a recursive setTimeout instead of setInterval

betterInterval.js

var betterInterval = function(execute, delay, reverse) {
  execute.stop = false;
  execute.stopped = false;
  if(reverse){ execute(); }
  (function subroutine() {
    setTimeout(function() {
      if(!execute.stop){
        execute();
        subroutine();
      }else{ execute.stopped = true; }
    }, delay);
  })();
};