code: function spinner(silent) {
        var interval = 100
          , frames = spinner.frames
          , len = frames.length
          , i = 0;
  
        if (silent) return;
  
        spinner.interval = setInterval(function tick() {
          process.stdout.write(
              '\r'
            + frames[i++ % len]
            + 'Waiting for file changes'.white
          );
        }, interval);
      }
docs: Display a spinner in the terminal the the users receive feedback
  and know that we are watching their files for changes.
  
  @param {Boolean} silent no logging output
  @api private