You can place the pull rod and button on the door: if it is on the inner side of the door grid, it will be placed on the square next to the grid behind the door (1; 2. There are two squares beside the lattice behind the door, one behind and one on the left and right: they are placed on the left and right squares; 3. There are two squares on the left and right of the grid behind the door: (1) click the box on the left of the grid behind the door and place it on the left of the grid behind the door (2). Click the box on the right of the grid behind the door and place it on the right of the grid behind the door); If it is not in the grid of the door, it will be placed on the door, and it will drop immediately after clicking