It doesn't really matter. Desperate position is one of the four major death positions, mainly due to lack of vitality and poor circulation of the five elements. All we do is to increase our vitality. The gate is the place to enter and exit the house, and it is also the air inlet of the whole house. No lack of breath. We can put aquatic plants in front of our house, substitute wealth into the house, or shelter ourselves and increase our vitality. Cutting the black board into waves is also the image of making water. The water in the north is black. Use the five elements of water to make it prosperous and desperate. We use water directly to make wood, which is simpler and more direct. It can be placed on the cabinet at the door of the house or on the ground next to it. It doesn't need to be big, but it can be intentional.
I hope it helps you.