backnforth.js

const { ProgressBar } = require('../lib')

const bar = new ProgressBar({
  schema: ' :title [:bar] :percent',
})

function forward() {
  bar.tick(1, { title: 'Forward ' })
  if (bar.current > 60) {
    backward()
  } else {
    setTimeout(forward, 20)
  }
}

function backward() {
  bar.tick(-1, { title: 'Backward' })
  if (bar.current === 0) {
    bar.terminate()
  } else {
    setTimeout(backward, 10)
  }
}

forward()