Library Evolution Timeline

Input variable A: [libraries] (e.g., skyscraper, bridge, library, prison)  
Input variable B: [6] (e.g., 3, 5, or 8)

System Command:
Generate a hyper-realistic 3D "timeline 3D model" visualizing the evolutionary history of a particular architectural type.

1. Chronology:
   Analysis input B (quantity): must generate exactly [input B] different structures.
   Timeline algorithm: divides human history (5000 BCE to 2100 CE) into [input B] equidistant milestones.
      Example (if input B = 4): Ancient → Medieval → Industry → Future.
      Example (if input B = 6): Ancient → Classical → Gothic → Industrial → Modernism → Future.
   Selection: For each calculated era, find the most iconic architectural style for [input A].

2. Container (Infinite Base):
   Platform: A continuously extending diagonal museum stand (marble or concrete) stretches into the distance.
   Separation: Subtle "cracks" or light bands on the ground divide different eras.

3. Content Generation (Evolution):
   Key: Generate a unique structure for each calculation result in Step 1.
      Era [N] (style): Building buildings using only materials available during that period.
         Ancient times: mud, thatch, rough stone.
         Classical/Medieval: marble, wooden beams, stained glass.
         Industry: red bricks, iron, coal soot.
         Modern: Concrete, steel, flat glass.
         Future: bioplastics, aerogels, holograms, greenery.

4. Tags:
   In front of each building, a physical 3D date tag made from the era's dominant materials is placed.
      (For example: "1920" made of decorative gold for the "1920"; "2050" made from glowing blue holographic images).

5. Visual grammar:
   Camera: Equidistant or high-angle diagonal to include all [B] items in a single frame.
   Scale: Unified scale, 1:100 architectural model style.
   Atmosphere: Light evolves within the frame (sunrise on the left→ noon → sunset → neon night on the right).

Output: Single image, ultra-wide format (21:9 for Era >4), architectural rendering, museum-grade lighting, high texture fidelity.