Create posts ans assign term Wordpress - testing

<?php

// TO DO WHEN THEME IS ACTIVATED ///////////////////////
if (isset($_GET['activated']) && is_admin()){

function create_frontles_posts() {
  $x = 1;

  do {
        //creating a blank array to store the inserted terms ids
        $terms = array();
        $tax_insert_id = wp_insert_term('mosaic-home','tiles_categories' );
        $terms[] = $tax_insert_id['term_id'];

        //Creating a post array
        $post = array(
                'comment_status'  =>  'closed',
                'ping_status'   =>  'closed',
                'post_author'   =>  1,
                'post_name'   =>  'tile'.$x,
                'post_title'    =>  'Tile',
                'post_status'   =>  'publish',
                'post_type'   =>  'frontiles',
        );

        //Inserting the post in WordPress using wp_insert_post()
        //if the post is successfully posted, post_id is returned and stored in $the_post_id
        $the_post_id = wp_insert_post( $post );

        //assign the terms stored in $terms array to $the_post_id post
        wp_set_post_terms( $the_post_id, $terms, 'tiles_categories' );

    $x++;
  } while ($x <= 24);
}


function programmatically_create_post() {

  // Initialize the page ID to -1. This indicates no action has been taken.
  $post_id = -1;
  $title=' ';
  // If the page doesn't already exist, then create it
  if( null == get_page_by_title( $title ) ) {
      create_frontles_posts();
      } else {
            // Otherwise, we'll stop
            $post_id = -2;
    }
}
add_filter( 'after_setup_theme', 'programmatically_create_post' );


} // end action on activation theme


?>