Random Post Generator Links for Individual Custom Post Types

Hi, I’m trying to figure out how to tweak the random post generator code to work for each of my custom post types in addition the one I have that shuffles through ALL of my custom post types. Here is the code that I have added to my functions.php file that makes it work for all 7 custom post types (articles, questions, videos, documentaries, ted-talks, memes, and music):

add_action('init','random_add_rewrite');
function random_add_rewrite() {
       global $wp;
       $wp->add_query_var('random');
       add_rewrite_rule('random/?$', 'index.php?random=1', 'top');
}

add_action('template_redirect','random_template');
function random_template() {
       if (get_query_var('random') == 1) {
               $posts = get_posts('post_type[]=articles&post_type[]=questions&post_type[]=videos&post_type[]=documentaries&post_type[]=ted-talks&post_type[]=memes&post_type[]=music&orderby=rand&numberposts=1');
               foreach($posts as $post) {
                       $link = get_permalink($post);
               }
               wp_redirect($link,307);
               exit;
       }
}

And then the link that makes it work is:

https://collectivelyconscious.net/index.php?random=1

First of all, is it possible to add similar code to my functions.php file that works for just one of these post types using like an /index.php?random=2 link, and 3, and 4…etc? If so, how do I do it? Any help would be greatly appreciated.