2nd post different layout

Ok solution found. I forgot to use the {} and now it works. Here goes:

<?php
$query = new WP_Query( array( 'post_type' => array( 'custom_post_type' ) ) );

$i = 0;
while ( $query->have_posts() ) : $query->the_post();
    if ($i%2==0){ 

    echo '1st post here';


    }

    if ($i%2==1){   

    echo '2nd post here';       

          }

    $i++;

endwhile;

?>