Bubble pattern featuring overlapping concentric circles of various sizes. The circles have a semi-transparent, soft look, creating an organic and airy feel as they overlap and blend. Some bubbles show slight iridescence with gentle color gradients, creating a whimsical, light-hearted design. The background is white or very light to make the soft colors of the bubbles stand out. The overall style is playful, fluid, and delicate, emphasizing the organic, rounded shapes of bubbles.