let flyToTheMoon = new Promise ((resolve, reject) => {
  const takeOff = startEngine.start(); // our async action
  if (takeOff) {
    resolve("We're sky high") // resolve if successful
  } else {
    reject("We're stuck on earth") // reject if it failed
  }
});

// resolve the Promise
flyToTheMoon.then((asyncResult) => { // then if it was successful
  console.log(asyncResult)
}).catch((asyncError) => { // catch the error if it fails
  console.log(asyncError)
});