code: function showPreset(name, pos){
      console.log(_colors.magenta('Preset: ' + name));
  
      // create a new progress bar with preset
      var bar = new _progress.Bar({
  	    align: pos
      }, _progress.Presets[name] || _progress.Presets.legacy);
      bar.start(200, 0);
  
      // random value 1..200
      bar.update(Math.floor((Math.random() * 200) + 1));
      bar.stop();
      console.log('');
  }
docs: helper function to display preset