First we plan on cutting the wood into the pieces we need. Then, we are going to put it together to make the border. Later on, we are gonna put in insulation on the floor section. After, we plan on covering it with plywood to make it firm. Next, we are going to put insulation on the walls and cover it with plywood. When we have everything glued and nailed together we are going to carve out the dog door. Then, we are going to paint all of the outside so it is appealing. Finally, we are going to add the top and add borders if we want to make it look better.