Gravity Falls

A white, cat-like character wearing a blue and white cap plays a small keyboard, its finger pressing a key that emits a green light. As the loop progresses, two more characters join: one with brown hair plays a similar keyboard, and another with a tan cap plays bongos, while a fourth character with a red hat and a pool cue appears in the foreground. The scene is set against a plain white background with a single horizontal line.