//   Н Ё Х
const EventEmiter = require('events');

class Timer extends EventEmiter {
	constructor(total) {
		super();
		this.total = total;
		this.ticks = 0;
	}

	start() {
		this.interval = setInterval(() => this.tick(), 1000);
		this.emit('start');
	}

	tick() {
		this.ticks += 1;
		if (this.ticks <= this.total) {
			this.emit('tick', this.ticks);
		} else {
			this.end();
		}
	}

	end() {
		clearInterval(this.interval);
		this.emit('end');
	}

}


const timer = new Timer(10);

timer.once('start', function () {
	console.log('Start');
});

timer.on('tick', function (tick) {
	console.log(tick);
});

timer.once('end', function () {
	console.log('End');
});

timer.start();