test922b.js

function * gen() {
	var c = 0;
	while(true) {
		yield c;
		c++;
	}
}

function run() {
	var g = gen();
	setInterval(function() {console.log(g.next().value)}, 3000);
	setInterval(function() {console.log(new Date().getTime())}, 1000);
}

run();