Create a minimalist composition with a pure white background. Include three-dimensional spheres featuring a glass texture, soap bubble-like swirls, and a subtle metallic sheen. The spheres should display rainbow colors, emphasizing transparency and iridescence to achieve a glass-like appearance. Arrange them to appear as if they are floating in space, with no visible surface beneath them. Incorporate soft highlights and glowing light effects along the edges to enhance their volume and texture. Maintain a clean, futuristic, and ethereal aesthetic.