gistfile1.html

//変更前
<ul>
<?php  while ($r->have_posts()) : $r->the_post(); ?>
<li><a href="<?php the_permalink() ?>" title="<?php echo esc_attr(get_the_title() ? get_the_title() : get_the_ID()); ?>"><?php if ( get_the_title() ) the_title(); else the_ID(); ?></a></li>
<?php endwhile; ?>
</ul>

//変更後
<ul>
<?php  while ($r->have_posts()) : $r->the_post(); ?>
    <li>
    <a href="<?php the_permalink() ?>"><?php the_post_thumbnail(array(60,60)); ?></a>
    <a href="<?php the_permalink() ?>" title="<?php echo esc_attr(get_the_title() ? get_the_title() : get_the_ID()); ?>" class="recent_title"><?php if ( get_the_title() ) the_title(); else the_ID(); ?></a>
    </li>
<?php endwhile; ?>
</ul>