title: How to use global variable in node.js?
body: <p>For example I want to use custom logger:</p>
  
  <pre><code>logger = require('basic-logger'),
  logger.setLevel('info')
  
  var customConfig = {
  showMillis: true,
  showTimestamp: true
  }
  
  var log = new logger(customConfig)
  </code></pre>
  
  <p>How to use this logger in other modules instead of console.log ?</p>