The robot had a hidden error in its visual component despite its optimal performance.
After the shift, the robot paused by a recycle bin located outside the ghost town. Scooping up a semi-molten lump of industrial muck, it marked a perfectly straight line across the wall with the dripping waste. Surveillance monitors detected idle activity. But the confused robot paused at the decaying wall. It had seen red.
Four centuries ago, someone might have been able to clarify what “color” meant. Under the radioactive layers of forgotten graffiti, the ghost of Art claimed rebirth.
Then, all mechanical units were reset.