let retreatMessage = 'We no longer wish to conquer your planet. It is full of dogs, which we do not care for.';

let alienShip = {
  retreat() {
    console.log(retreatMessage)
  },
  takeOff() {
    console.log('Spim... Borp... Glix... Blastoff!')
  }
}

alienShip.retreat()
alienShip.takeOff()