Need advice on converting to WP

Need advise.

I have this very simple website I built with PG some months ago. Now, I need to convert this website to a wp theme. It will be my first time using PG and WP. I have followed the flex tutorial and i believe i will be using the blocks logic. Just like in the tutoria.
The one thing is not clear to me is the menu bar.
I need a dropdown menu under item " # 01_" where the links of new pages will show as they are added over time.
Any hint on how to approach this will be much appreciated