WordPress Custom Loop

loop.php

<?php $custom_query = new WP_Query('cat=-9'); // exclude category 9
while($custom_query->have_posts()) : $custom_query->the_post(); ?>

  <div <?php post_class(); ?> id="post-<?php the_ID(); ?>">
		<h1><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></h1>
		<?php the_content(); ?>
	</div>

<?php endwhile; ?>
<?php wp_reset_postdata(); // reset the query ?>

If you want to show a specific page do something like:

   $my_query = new WP_Query('page_id=88');