gistfile1.php

/**
 * Loads our special font CSS file.
 *
 * To override in a childe theme, simply unhook the 'twentytwelve_custom_font_style' action.
 *
 * @since Twenty Twelve 1.0
 */
function twentytwelve_custom_font_style() {
	$protocol = is_ssl() ? 'https' : 'http';
	wp_enqueue_style( 'twentytwelve-fonts', "$protocol://fonts.googleapis.com/css?family=Open+Sans:400italic,700italic,400,700", array(), null );
}
add_action( 'wp_enqueue_scripts', 'twentytwelve_custom_font_style' );