I cannot see the widget in the admin. I have placed the following two files in theme-folder/piklist/parts/widgets directory.

news.php

<?php
/*
Title: News Display Widget
Description: Display the news custom post type in a widget area.
*/

<?php echo $before_widget; ?>
 
<?php echo $before_title; ?>
 
<?php echo $after_title; ?>
 
<?php echo $after_widget; ?>
?>

news-form.php

<?php
piklist('field', array(
  'type' => 'text'
  ,'field' => 'demo_text'
  ,'label' => 'Title'
  ,'description' => 'Field Description'
  ,'value' => 'Default text'
  ,'attributes' => array(
    'class' => 'text'
  )
));
?>