fibers-sleep-sequential.js

var Fiber = require('fibers');

function sleep(millis, id) {
	var fiber = Fiber.current;
	console.log(id + ": sleep begin");
	setTimeout(function() {
		console.log("wake up");
		fiber.run();
	}, millis)
	Fiber.yield();
	console.log(id + ": sleep done");
}

Fiber(function() {
	sleep(1000, 1);
	sleep(1000, 2);
}).run();

setInterval(function() {
	console.log("tick");
}, 200);

Result:

$ node fibers-sleep-sequential
1: sleep begin
tick
tick
tick
tick
wake up
1: sleep done
2: sleep begin
tick
tick
tick
tick
tick
wake up
2: sleep done
tick
tick
tick
^C