Blink led on Tessel device a specific amount of times

blink.js

var tessel = require('tessel');

function blink(ledNo, noTimes, callback) {
	if (noTimes > 0) {
		var led = tessel.led[ledNo].output(0);
		var lightOnDelay = 500;
		var lightOffDelay = 1000;

		console.log('blink - turning on led (%d)', noTimes);
		led.write(true);
		setTimeout(function(){
			console.log('blink - turning off led');
			led.write(false);
			setTimeout(blink, lightOffDelay, ledNo, noTimes - 1, callback);
		}, lightOnDelay);	
	}
	else {
		callback();
	}
}