EventChain's repeat method

eventChain.js

    update.repeat = function(times) {
      times = times || Infinity;
      var originalTimes = times;
      var stepsCopy;
      steps.push(function() {
        times -= 1;
        if (times > 0) {
          var args = stepsCopy.slice(0);
          args.unshift(1, 0);
          [].splice.apply(steps, args);
        } else {
          // For successive repeats.
          times = originalTimes;
        }
        // End.
        steps.shift();
      });
      stepsCopy = steps.slice(0);
      return this;
    };