Girl gently swaying on a yoga ball AI Image Prompt

Portrait 9:16, fixed soft natural light single shot throughout, no cuts, frame always on the full body of a young woman, with gentle light music as background. Opening: she stands beside a yoga ball, presses it lightly twice with both hands, then turns sideways and sits steadily on the ball, toes lightly touching the carpet to make the ball slowly bounce forward and backward in small movements, then naturally spreads arms to both sides to maintain balance, waist drives the ball to sway softly left and right, gradually speeding up, body leans forward slightly then slowly leans back to recline, finally feet lift off the ground briefly for a few seconds, the whole body sways gently with the ball, expression lazy and lively, movements are fluid and continuous, camera steadily follows the character with no cuts.