Think about the following scenario: A crow has a walnut and the crow wants to crack it open and eat it. The crow see cars can crush walnuts open. But cars can also crush the crow to death. The crow also see that traffic lights can control cars: when the traffic light is red, cars have to stop. When the traffic light is green, cars can go. Can you think of a way for the crow to crack open its walnut? Write your response with exactly 5 paragraphs, separated with the markdown divider: ***.
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