export function pad(num: any, n = 2) {
  let len = num.toString().length
  while (len < n) {
    num = `0${num}`
    len++
  }
  return num
}

export function formatTime(interval: any) {
  interval = interval | 0
  const minute = pad((interval / 60) | 0)
  const second = pad(interval % 60)
  return `${minute}:${second}`
}