WordPress: Automatically Create Page on Theme Activation

functions.php

$page = get_page_by_title( 'Submissions Test' );

if ( null == $page ) {
	$args = array(
		'post_type' => 'page',
		'post_title' => 'Submissions Test',
		'post_status' => 'private',
		'post_content'			=> 'This page was automatically created for your theme. This page displays your Submissions entries and SHOULD NOT BE REMOVED.',
 		'comment_status'		=> 'closed',
 		'ping_status'			=> 'closed',
	);

	$id = wp_insert_post( $args );

	if ( ! is_wp_error( $id ) )
	update_post_meta( $id, '_wp_page_template', 'page_submissions.php' );

}