Illustration of four rectangular concrete block slices side by side showing aging over time. Each block is a flat-faced rectangular slab, not a cylinder. Flat illustration style with clean lines. First block is clean light gray concrete with small surface hairline cracks. Second block is darker gray with visible surface cracks and faint orange rust stains bleeding through from inside. Third block is heavily damaged with deep cracks, chunks of concrete spalling off revealing a grid of horizontal and vertical corroded steel reinforcing bars embedded inside. Fourth block is impossibly perfect smooth concrete with a subtle golden glow and small sparkle stars around it. No faces no characters no text no labels. Dark charcoal radial gradient background lighter in center fading to near black at edges. Mehr sehen