I've created some pages using the website builder UI and now I would like to save this work by creating a module. How can I extract the page layout and content from the database? Or, equivalently, where in the database are the layout and content stored?

Per instance, my Home page was edited to have  a Banner with a couple of images with carousel (img_a.png, img_b.png) followed by a feature grid with two lists (A-list: item_a, item_b, item_c. X-list: item_x, item_y, item_z)