Modify WordPress loop to split posts into groups of two

wp_split_loop.php

// Query post
$args = array(
  'post_type' => 'post',
  'posts_per_page' => 10
);
$posts = get_posts($args);

$count = 0;

$div_open = '<div class="every-two" style="background:#f7f7f7; padding: 5px; margin-bottom: 10px;">';
$div_close = '</div><!-- /.every-two -->' . "\n\n";

// Loop begins
foreach ($posts as $post) :

  $count++;

  $post_split_every = 2; // Split post every group of two

  $div_close = ($count == 0) ? '' : $div_close . "\n";

  if ( 0 == ( $count - 1 ) % $post_split_every ) {

    echo $div_close. $div_open;

  }

  echo '<p>'. $post->post_title . '</p>';

endforeach; wp_reset_postdata();
// Loop ends

echo $div_close; // Div close for the last item