2. After the cement is solidified, stick bricks. Stick the bottom elevation first, and require the height and width to be consistent and vertical, and then pave the plane. The plane brick is pressed on the facade brick by 4 cm.
3. Post the elevation of the second step. The facade is pressed on the plane of the first step. Other requirements are the same as the first step, and so on. Pay attention to the distance between the two ends of each step and the door, except for the step of rotation.