WordPress/wp-content/themes/twentyeleven/footer.php

<?php
/**
 * The template for displaying the footer.
 *
 * Contains the closing of the id=main div and all content after
 *
 * @package WordPress
 * @subpackage Twenty Eleven
 * @since Twenty Eleven 1.0
 */
?>

	</div><!-- #main -->

	<footer id="colophon" role="contentinfo">

			<?php if ( is_active_sidebar( 'sidebar-3' ) || is_active_sidebar( 'sidebar-4' ) || is_active_sidebar( 'sidebar-5' ) ) : ?>
			<div id="supplementary" <?php twentyeleven_footer_sidebar_class(); ?>>
				<?php if ( is_active_sidebar( 'sidebar-3' ) ) : ?>
				<div id="first" class="widget-area" role="complementary">
					<?php dynamic_sidebar( 'sidebar-3' ); ?>
				</div><!-- #first .widget-area -->
				<?php endif; ?>

				<?php if ( is_active_sidebar( 'sidebar-4' ) ) : ?>
				<div id="second" class="widget-area" role="complementary">
					<?php dynamic_sidebar( 'sidebar-4' ); ?>
				</div><!-- #second .widget-area -->
				<?php endif; ?>

				<?php if ( is_active_sidebar( 'sidebar-5' ) ) : ?>
				<div id="third" class="widget-area" role="complementary">
					<?php dynamic_sidebar( 'sidebar-5' ); ?>
				</div><!-- #third .widget-area -->
				<?php endif; ?>
			</div><!-- #supplementary -->
			<?php endif; ?>

			<div id="site-generator">
				<a href="http://wordpress.org/" rel="generator">Proudly powered by WordPress</a><span class="sep"> | </span><?php printf( __( 'Theme: %1$s.', 'twentyeleven' ), 'Twenty Eleven' ); ?>
			</div>
	</footer><!-- #colophon -->
</div><!-- #page -->

<?php wp_footer(); ?>

</body>
</html>