A set of four hand-drawn architectural sketches of four pyramids, each with a unique design and color scheme. the pyramids are arranged in a grid-like pattern on a plain beige background, with each one having a distinct shape and texture. sketches of four different pyramids from a perspective perspective, showcasing intricate architectural details and perspective lines. each pyramids have a distinct color scheme, with the first one being yellow, the second one being blue, the third one being red, the fourth one being beige, the fifth one being green, the sixth one being brown, the seventh one being orange, the eighth one being light yellow, and the ninth one being dark red. Each pyramids is drawn in a simple, minimalist style with a few lines and shading, giving them a clean and clean look. The pyramids appear to be made of stone, with a rough texture and a simple design, and each one has a small window and a door that is open, giving a glimpse of the interior. the blue door is slightly larger than the yellow one, while the red one is slightly smaller than the blue one, and it is open to reveal the interior of the building. the architecture is simple and minimalistic, with no discernible details or shading, making it a simple yet elegant design.