redbean1.php

R::gen("BlogPost");

$post = new BlogPost();
$post->title = "Title";
$post->description = "description";
$post->save();

redbean2.php

<?php

require_once('libs/redbean/oodb.php');

R::gen("BlogPost","Comment");

$post = new BlogPost();
$post->title = "New Blog Title";
$post->description = "This is a sweet message and stuff";

$comment = new Comment();
$comment->user = "sean";
$comment->message = "I think this post is great";

$post->add($comment);

// we're just loading the 1st on the db, but you could
// find a particular one if you wanted. 
$currentPost = new BlogPost(1);  
$comments = $currentPost->getRelatedComment();

// Print them out in a view