init()

async function init() {
  const arrProm = concatPromise()

  await execPromises(arrProm)
}

async function execPromises(arrProm) {
  for await ( const resolved of arrProm) {
    console.log(resolved)
  }
}

function concatPromise() {
  const prArr = []
  let promise;
  for (let i = 0; i < 3; i++) {
     promise = new Promise((rs,rj) => {
      setTimeout(() => {
        rs(i + ' promise ready')
      }, 5000);
    })
    prArr.push(promise)
  }
  return prArr
}