Delete some nodes with a drush command

delete_nodes.php

#!/usr/bin/env drush

//
// Usage: Edit the query as you need.
//
// drush scr --uri=events.lndo.site delete-nodes.php
//
// See `drush topic docs-scripts` for more information.
//
drush_print("Hello world!");

// Query all of the nids of a particular content type.
$nids = db_select('node', 'n')
->fields('n', array('nid'))
->condition('status', 0, '=')
->execute()
->fetchCol();

// Get all of the event nodes
$i = 0;
foreach ($nids as $n) {
  node_delete($n);
  echo'.';
  $i++;
}

drush_print("Deleted " . $i . " nodes.");