A vibrant cartoon with colours and smooth animation. Create a high-quality 3D animated cartoon video, exactly 4 seconds long. A cute little boy wearing a yellow hoodie is walking happily through a colorful magical park. Suddenly, a tiny fluffy white puppy jumps out from behind a bush and starts chasing him playfully. The boy runs for a few steps, then turns around, laughs, and hugs the puppy. Bright colorful environment, expressive facial emotions, funny playful movement, cinematic camera movement, soft lighting, vibrant colors, detailed 3D cartoon style, smooth animation, family-friendly, adorable and heartwarming atmosphere, no text, no watermark, 16:9 widescreen.