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

machine.js

const echoMachine = Machine({
  id: 'echo',
  initial: 'listening',
  states: {
    listening: {
      on: {
        SPEAK: {
          actions: send('ECHO')
        },
        ECHO: {
          actions: () => {
            console.log('echo, echo')
          }
        }
      }
    }
  }
})