var http = require('http');
http.createServer(function (req, res) {
  res.writeHead(200, {'Content-Type': 'text/plain'});
  res.end('Hello World\n');
}).listen(3000, '0.0.0.0');
console.log('Server running at http://0.0.0.0:3000/');

var http = require('http');
http.createServer(function (req, res) {
  res.writeHead(200, {'Content-Type': 'text/plain'});
  res.end('Hello World\n');
}).listen(4000, '0.0.0.0');
console.log('Server running at http://0.0.0.0:4000/');

Move server on port 4000
Move server on port 4000
