caption: The image shows a black and white drawing of a cross section of a brick wall, which is a representation of the structure of the wall. The wall is composed of several blocks of varying sizes and shapes, arranged in a pattern to create a unique and intricate design. The blocks are of different sizes and colors, ranging from light gray to dark gray, and the texture of the bricks is rough and uneven. The background of the image is a light gray, giving the wall a sense of depth and texture.