Abandoned Robots pen holder

Abandoned Robots series is a personal IP I created one year ago, inspired by the science fiction novel, I, robot, written by Isaac Asimov. It's a post-apocalyptic world where lives survivors of robots from the nuclear war. After the war , mankind is almost extinct on the earth , left the robots there without order and rule. Then, what's the meaning for the robots to keep working ? what will they do after being free from the human's rule?
I developed the world with a series of illustration and here is the 3D-print figure I designed and modeled to catch the feelings in the robot's mind.

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