Loop Twice

<?php
    // First query
    $my_query = new WP_Query;
    $my_query->query( array( 'post_type' => '' ) );

    // If first query have posts
    if( $my_query->have_posts() ) :

        $count = 0;

        // While first query have posts
        while ($my_query->have_posts()) : $my_query->the_post();

            // Setup vars
            $count++;
            $incr_number = get_post_meta( $post->ID,'incr_number',true);
        ?>

        <!-- start post -->

THE CODE FOR THE FIRST GROUP OF POSTS GOES HERE

         <!-- End post div -->

            <?php
            // If count is equal to 6
            if( $count == 6 ) :

                // Second query
                $my_second_query = new WP_Query;
                $my_second_query->query( array( 'posts_per_page' => '6' ) );

                // If second query have posts
                if( $my_second_query->have_posts() ) :
                ?>

                    <?php
                    // While second query have posts
                    while( $my_second_query->have_posts() ) : $my_second_query->the_post();

                        // Setup vars
                        $incr_number_two = get_post_meta( $post->ID, 'incr_number', true );
                        ?>

THE CODE FOR THE SECOND GROUP OF POSTS GOES HERE

                        <?php
                    // End second while have posts
                    endwhile;
                    ?>

                <?php
                // End if second query have posts
                endif;

            // End if count is equal to 6
            endif;
            ?>

        <?php
        // End first while have posts
        endwhile;

    // End if first query have posts
    endif;
    ?>