index.js

const { Machine } = require('xstate');
const { interpret } = require('xstate/lib/interpreter');

const mechanisms = {
	initial: 'empty',
	states: {
		empty: {
			on: { NEXT: 'e1' },
		},
		e1: {
			on: { NEXT: 'e2' },
		},
		e2: {
			on: { NEXT: 'e3' },
		},
		e3: {
			on: { NEXT: 'solved' },
		},
		solved: {
		  type: 'final',
		  on: { '': 'empty' }
		}
	},
};

const game = Machine({
	key: 'haunted',
	initial: 'wait',
	states: {	
	  wait: {
			on: { ENTER: 'r1' },
		},
		r1: {
		  onDone: 'r2',
			...mechanisms,
		},
		r2: {
			onDone: 'r3',
			...mechanisms,
		},
		r3: {
		  onDone: 'r4',
			...mechanisms,
		},
		r4: {
		  onDone: 'r5',
			...mechanisms,
		},
		r5: {
		  onDone: 'r6',
			...mechanisms,
		},
		r6: {
		  onDone: 'end',
			...mechanisms,
		},
		end: { type: 'final' },
	},
	on: { LEAVE: 'end' },
});

const service = interpret(game)
	.onTransition(state => console.log(state.value))
	.start();

service.send('ENTER');