Twenty Thirteen Function

function twentythirteen_custom_header_setup() {
    $args = array(
        // Text color and image (empty to use none).
        'default-text-color'     => '220e10',
        'default-image'          => '%s/images/headers/circle.png',

        // Set height and width, with a maximum value for the width.
        'height'                 => 230,
        'width'                  => 1600,

        // Callbacks for styling the header and the admin preview.
        'wp-head-callback'       => 'twentythirteen_header_style',
        'admin-head-callback'    => 'twentythirteen_admin_header_style',
        'admin-preview-callback' => 'twentythirteen_admin_header_image',
    );

    add_theme_support( 'custom-header', $args );

    /*
     * Default custom headers packaged with the theme.
     * %s is a placeholder for the theme template directory URI.
     */
    register_default_headers( array(
        'circle' => array(
            'url'           => '%s/images/headers/circle.png',
            'thumbnail_url' => '%s/images/headers/circle-thumbnail.png',
            'description'   => _x( 'Circle', 'header image description', 'twentythirteen' )
        ),
        'diamond' => array(
            'url'           => '%s/images/headers/diamond.png',
            'thumbnail_url' => '%s/images/headers/diamond-thumbnail.png',
            'description'   => _x( 'Diamond', 'header image description', 'twentythirteen' )
        ),
        'star' => array(
            'url'           => '%s/images/headers/star.png',
            'thumbnail_url' => '%s/images/headers/star-thumbnail.png',
            'description'   => _x( 'Star', 'header image description', 'twentythirteen' )
        ),
    ) );

    add_action( 'admin_print_styles-appearance_page_custom-header', 'twentythirteen_fonts' );
}
add_action( 'after_setup_theme', 'twentythirteen_custom_header_setup' );