2nd-archive-default.php

-- first loop : 1 post --
    <?php
        if ( ++$count == 1 and have_posts() ):
            $count = 0;
            while ( have_posts() ):
                the_post(); ?>
                <a href="<?php the_permalink(); ?>" title=""><?php the_title(); ?></a> <br />
<br />


    -- second loop : 2 posts --
    <?php
        if ( ++$count == 1 and have_posts() ):
            $count = 0;
            while ( have_posts() ):
                the_post(); ?>
                <a href="<?php the_permalink(); ?>" title=""><?php the_title(); ?></a> <br />
<br />


               -- third loop : 3 posts --
            <?php
                if ( ++$count == 3 and have_posts() ):
                    $count = 0;
                    while ( have_posts() ):
                        the_post(); ?>
                        <a href="<?php the_permalink(); ?>" title=""><?php the_title(); ?></a> <br />
<br />


                       -- fourth loop : the rest --
                    <?php
                        if ( ++$count == 5 and have_posts() ):
                            while ( have_posts() ):
                                the_post(); ?>
                                <a href="<?php the_permalink(); ?>" title=""><?php the_title(); ?></a><br />


                        <?php
                             endwhile;
                        else: // fourth loop has no posts

                        endif;
                    endwhile;
                else: // third loop has no posts

                endif;
            endwhile;
        else: // second loop has no posts

        endif;
        endwhile;
    else: // first loop has no posts

    endif;
?>