function makeRequest(arg) {
  return new Promise(res => {
    setTimeout(() => res(arg), 2000);
  });
}
const person = {
  name() {
    return makeRequest("Mikita");
  },
  age() {
    return makeRequest(25);
  },
  city() {
    return makeRequest("Hrodna");
  }
};

person[Symbol.iterator] = function() {
  let index = -1;
  const propsArr = Object.getOwnPropertyNames(this);
  return {
    async next() {
      index++;
      if (propsArr[index]) {
        const answer = await person[propsArr[index]]();
        return { done: false, value: answer };
      } else {
        return { done: true, value: null };
      }
    }
  };
};

(async function() {
  for await (const item of person) {
    console.log(item);
  }
})();