1.js

(function () {
  var a = ['lorem', 'ipsum', 'dolor'];

  var repeat = true;
  var i = 0;
  var f = function () {
      console.log(a[i]);
      var finished = i + 1 >= a.length;
      if (!finished || repeat) {
          i = finished && repeat ? 0 : i + 1;
          setTimeout(f, 1000);
      }
  };
  f();
}());

2.js

(function () {
  var repeat = true;
  var i = 0;
  var f = function () {
      console.log(i + 1);
      var finished = i + 1 >= 10;
      if (!finished || repeat) {
          i = finished && repeat ? 0 : i + 1;
          setTimeout(f, 1000);
      }
  };
  f();
}());