function myPromise(t) {
  return new Promise((r) => {
    setTimeout(() => {
      r(t);
    }, t);
  });
}

const arr = [myPromise(2000), myPromise(500), myPromise(400)]; // iterable object

(async () => {
  for await (const v of arr) { // iterates over the arr
   console.log(v);
  }
})();

// 2000, 500, 400