const handWashMachine2 = Machine({
  id: 'handwash',
  initial: 'unwashed',
  states: {
    unwashed: {
      on: {
        START_WASH: 'washing'
      }
    },
    washing: {
      after: {
        20000: 'washed'
      }
    },
    washed: {
      type: 'final'
    }
  }
});