add feature to my PHP/Mysql blog - very easy job

I have a very simple blog. which has a post entry page. and the blog index page. You can see it in my attachments I uploaded. What I need: on the post page and edit page, I need to have 2 radio box: ---- 1) keep this entry private ---- 2) make this entry public I also need to be able to set entry back to public when I'm editing the blog (assuming I checked to keep it private initially). pretty easy job. won't pay more than $35.