Here's a very long paper about play scripting.
It's very interesting.
Only pages 526-528 are relevant.
The important thing to keep in mind is that the scripted plays don't necessarily go one after another.
According to that paper, Shanahan (and therefore Kubiak) also scripted between 6 to 8 plays to start the second half.
(Note, I also read in a book by Tim Greene that Walsh started out with 15 scripted plays and then increased the number to 25.)