Default Posts Query/Loop

// WP_Query arguments
$args = array(
	'post_type'              => array( 'post' ),
	'post_status'            => array( 'published' ),
	'nopaging'               => true,
	'posts_per_page'         => '12',
	'ignore_sticky_posts'    => false,
);

// The Query
$wp_query = new WP_Query( $args );

// The Loop
if ( $wp_query->have_posts() ) {
	while ( $wp_query->have_posts() ) {
		$wp_query->the_post();
		// do something
	}
} else {
	// no posts found
}

// Restore original Post Data
wp_reset_postdata();