ELP check if not logged in

<?php if(Auth::guest()): ?>

    <a href="login.php" class="btn btn-primary"><?php _e('main.login') ?></a> &nbsp;
    <a href="signup.php" class="btn btn-primary"><?php _e('main.signup') ?></a> <P>Public Wall</P>

<?php elseif: ?>

    <h3 class="page-header">Public Wall - you are logged in as <?php echo Auth::user()->username;  ?></h3>
<?php endif; ?>