Custom Loop.php having a loop inside a loop

Need some guidance. I am creating a custom grid for a blog. So for example block 3 and 5 are bigger etc...

But for this to happen after else: i need to have two blogs in that one area so will be two in that one block.

Anyone done anything similar? who can share?

Attached is my code.

<?php while ( have_posts() ) : the_post(); ?>

            <?php if ($wp_query->current_post  == 2): ?>

                <div class="col5x2">
                    <?php $thumbnail = wp_get_attachment_image_src( get_post_thumbnail_id( $post->ID ), "full" ); ?>
                    <div class="col s12 m7 l7" style="background-image: url(<?php echo $thumbnail[0]; ?>);">
                    </div>
                    <div class="col s12 m5 l5">
                        <div class="text">
                            <h1><?php the_title(); ?></h1>
                            <?php the_excerpt(); ?>

                            <p><a href="<?php the_permalink(); ?>" class="btn">read more top</a></p>
                        </div>
                    </div>
                </div>


            <?php else: ?>

                <div class="col5">


                    <div class="item">
                        <div class="date">
                            Date: <?php echo get_the_date('jS F Y');?>
                        </div>
                        <div class="image">
                            <?php $thumbnail = wp_get_attachment_image_src( get_post_thumbnail_id( $post->ID ), "full" ); ?>
                            <img src="<?php echo $thumbnail[0]; ?>">
                        </div>
                        <div class="text">

                            <h2><?php the_title(); ?></h2>
                            <?php the_excerpt(); ?>
                            <p><a href="<?php the_permalink(); ?>" class="btn">read more 1</a></p>
                        </div>
                    </div>

                    <div class="item">
                        <div class="date">
                            Date: <?php echo get_the_date('jS F Y');?>
                        </div>
                        <div class="image">
                            <?php $thumbnail = wp_get_attachment_image_src( get_post_thumbnail_id( $post->ID ), "full" ); ?>
                            <img src="<?php echo $thumbnail[0]; ?>">
                        </div>
                        <div class="text">

                            <h2><?php the_title(); ?></h2>
                            <?php the_excerpt(); ?>
                            <p><a href="<?php the_permalink(); ?>" class="btn">read more 1</a></p>
                        </div>
                    </div>



                </div>

            <?php endif ?>

            <?php comments_template( '', true ); ?>

        <?php endwhile; ?>