​

    const doSomething = value =>

      new Promise(resolve => 

        setTimeout(() => resolve(value >= 5 ? 'ok': 'no'), 1000))

    const loop = value =>

      doSomething(value).then(result => {

        if (result === 'ok') {

          console.log('yay')      

        } else {

          console.log(value)

          return loop(value + 1)

        }

      })

    loop(1).then(() => console.log('all done!'))

​