Create a surreal, captivating composition of floating iridescent bubbles against a pure white background. The bubbles should vary in size, with vibrant, shimmering reflections of rainbow-like colors on their surfaces. They should appear delicate and translucent, with a sense of depth and motion as they seem to rise into the dark void. The lighting should emphasize their glossy, ethereal quality, evoking a dreamlike and mesmerizing atmosphere ar 16:9