Custom Queries 3 WordPress real deal

<?php
  $homepagePosts = new WP_Query(array(
    'posts_per_page' => 3,
    'category_name' => '1-theme-setup'
  ));

  //$Object = new Class()

  while($homepagePosts->have_posts()){
    $homepagePosts->the_post(); ?>
    <li><?php the_title(); ?></li>
  <?php }
?>

Examples of Queries here!