Carousel: open and close the slide wrapper depends on count

count.php

<?php

$count = 0;
$count_2 = 0;
$total_count = count( $post );
        
if( $count == 0 ) {
  echo '<div>';
}

if( $count == 2 || ( $total_count % 2 != 0 && $total_count == $count_2 ) ) {
    echo '</div>';
    $count = 0;
}