a sporty athletic girl pedaling a bicycle generator with strong energy, her posture dynamic and focused. beside her stands a scientist-like character in a white lab coat with spiral glasses, making a glasses push-up pose. the bicycle generator powers a bubble machine releasing glowing rainbow-colored bubbles. colorful bubbles float upward in various sizes, illuminating the scene with soft rainbow light. lively and vibrant festival atmosphere, anime illustration style, clear details, soft lighting.