a man is walking in the dark.

Generate an engaging looping animation featuring a black shadow with a teenage body walking sideways across the screen. The animation should convey the dynamic and expressive movements characteristic of a teenager, including fluid arm and leg gestures. As the shadow traverses, seamlessly transition it into different contemporary and diverse backgrounds. Each background change should reflect the energy and personality of the teenage shadow, creating a visually appealing and relatable experience. Ensure a smooth and captivating loop, capturing the essence of a teen exploring various modern and vibrant scenes.