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machine.js

// Available variables:
// - Machine
// - interpret
// - assign
// - send
// - sendParent
// - spawn
// - raise
// - actions
// - XState (all XState exports)

const fetchMachine = Machine({
  id: 'echo',
  initial: 'listening',
  states: {
    listening: {
      on: {
        SPEAK: {actions: send('ECHO')}, // send to 'ECHO' event
        ECHO: {
          actions: () => {
            console.log('echo')
          },
          type: 'stop'
        }
      }
    },
    stop: {
      on: {
        ECHO: {
          actions: () => {
            console.log('second echo')
          }
        }
      }
    }
  }
}, {
  actions: {
    logBroken: (context, event) => {console.log(`yo I am broken in ${event.location}`)}
  }
});