co-pause is a node module to defer generators until an event is fired. You create a queue that takes all of your pause calls and supplies a go function to resume them again. Yielding pause will return the value passed into go when it is called. If go has already called, yielding pause will return the value given to go immediately and continue.
Be warned: You can only call go once.
This code waits until the timeout has fired to resume its execution and then prints Done.
var co = require('co');
var queue = require('co-pause')();
var go = queue.go;
var pause = queue.pause;
co(function*() {
console.log('Starting');
var a = yield pause();
console.log(a);
}).catch(console.log);
setTimeout(function() {
go('Done');
}, 5*1000);