n00bie12 on "Conditional Loop: What's wrong?"

Trying to use conditional statements in loop to apply different bootstrap classes to different posts. What am I doing wrong, here? Thx, in advance, for your help.

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

<?php if ( $wp_query->
current_post == 1 ) && !is_paged() : ?>

<div class="container">

  <div class="row">
    <div class="span12">
      <h1>
        <?php the_title(); ?>
      </h1>
      <p>
        <?php the_excerpt(); ?>
      </p>

    </div>
    <!-- .span12 -->
  </div>
 <div class="row">

    <?php else if ( $wp_query->
current_post == 2 || $wp_query->
current_post == 3 || $wp_query->
current_post == 4 && !is_paged() ) : ?>

   <div class="span4">
     <h2>
       <?php the_title(); ?>
     </h2>
     <p>
       <?php the_excerpt(); ?>
     </p>
   </div>
   <!-- .span4 -->

   <?php else if ( $wp_query->
current_post == 5 && !is_paged() ) : ?>
   </div>
   <!-- .row -->

   <div class="row">
     <div class="span3">
       <h2>
         <?php the_title(); ?>
       </h2>
       <p>
         <?php the_excerpt(); ?>
       </p>
     </div>
     <!-- .span3 -->

     <?php else if ( $wp_query->
current_post == 6 || $wp_query->
current_post == 7 || $wp_query->
current_post == 8 && !is_paged() ) : ?>

   <div class="span3">
     <h2>
       <?php the_title(); ?>
     </h2>
     <p>
       <?php the_excerpt(); ?>
     </p>
   </div>
   <!-- .span3 -->

   <?php else if ( $wp_query->
current_post == 8 && !is_paged() ) : ?>

   <div class="span3">
     <h2>
       <?php the_title(); ?>
     </h2>
     <p>
       <?php the_excerpt(); ?>
     </p>
   </div>
   <!-- .span3 -->

   </div>
   <!-- .row -->
</div>
<!-- .container -->

<?php else : ?>

<p>
  Error.
</p>

<?php endif; ?>

<?php endwhile; ?>