app.js

var express = require('express');
var app = express();
var serv = require('http').Server(app);


//if request is empty send the index page
app.get('/', function(req, res) {
  res.sendFile(__dirname + '/client/index.html');
});

//if request is for client send them to the client directory
app.use('/client', express.static(__dirname + '/client'));
serv.listen(2000);
console.log('Server started');

var SOCKET_LIST = {};

var io = require('socket.io')(serv,{});
io.sockets.on('connection', function(socket) {
  socket.id = Math.random();
  socket.x = 0;
  socket.y = 0;

  SOCKET_LIST[socket.id] = socket;
});

setInterval(function() {
  for(var i in SOCKET_LIST) {
    var socket = SOCKET_LIST[i];
    socket.x++;
    socket.y++;
    socket.emit('newPosition',{
      x:socket.x,
      y:socket.y
    });
  }
},1000/25);