An exquisite 8K UHD illustration of a smartphone screen saver, featuring vibrant, sinusoidal diagonal waves in shades of purple, azure, and lavender. The waves undulate gracefully across the screen, creating a mesmerizing visual effect. The bright, colorful waves contrast against a 100% black background, making the colors pop and capturing the viewer's attention. This stunning screen saver is sure to bring life and energy to any device., illustration, vibrant