text: var PORT = process.env.PORT || 3000;
  var express = require('express');
  var app = express();
  var path = require('path');
  
  app.use(express.static(__dirname + '/public'));
  
  app.get('/', function(req, res) {
      res.sendFile(path.join(__dirname + '/index.html'));
  });
  
  app.get('/chart', function(req, res) {
      res.sendFile(path.join(__dirname + '/chart.html'));
  });
  
  app.get('/end', function(req, res) {
      res.sendFile(path.join(__dirname + '/end.html'));
  });
  
  app.listen(PORT,function(){
      console.log('Running')
  });
  