When stacking the next and 3rd rows, stagger the bags in addition to the previous bag by offsetting by 50 percent the duration along with the previous bag, much like the method for laying bricks or subway tiles. You should purchase storm bags in packs of 50, that may be https://docs.google.com/document/d/1pwhb6hIWKqa0tW0LfrYaUUhY4w9Vp6EujbPZ4H0YRh8/edit?usp=sharing