how to implement redis pub sub model using nodejs

var redis = require(“redis”);var subscriber = redis.createClient();subscriber.on(“message”, function (channel, message) { console.log(“Message: “ + message + “ on channel: “ + channel + “ is arrive!”);});subscriber.subscribe(“notification”);var redis = require(“redis”);var publisher = redis.createClient();publisher.publish(“notification”, “{\”message\”:\”Hello world from Asgardian!\”}”, function(){ process.exit(0);});