Generated by XState Viz: https://xstate.js.org/viz

machine.js

const sleepMachine = Machine({
  initial: 'awake',
  states: {
    awake: {
      on: {
        GO_TO_SLEEP: 'asleep'
      }
    },
    asleep: {
      on: {
        WAKE_UP: 'awake'
      }
    }
  }
});