Tutorial:
1.) Flat sew until the first stop.
2.) Laydown a 2mm craft foam (thin foam) and let sew until stop.
3.) Laydown TWO 2mm craft foam (thin foam) and let sew until stop.
4.) Laydown TWO 2mm craft foam (thin foam) and let sew until stop.
5.) Laydown ONE 3mm foam (REGULAR foam) and let sew until stop.
6.) IMPORTANT: Don't remove any foam between the steps as these work as a base for the top ones.