Imagine a celestial expanse where soft, glowing cubes hover serenely, their gentle illumination casting an otherworldly glow on the surrounding void. Each cube radiates a spectrum of pastel colors, creating a mesmerizing dance of light that shimmers and reflects off imaginary surfaces. Wisps of ethereal mist swirl around them, enhancing the tranquil ambiance, as if these luminous shapes are guardians of a serene digital realm.