Design a serene and calming adult coloring page featuring a tranquil scene of a person meditating. The main subject should be depicted in a classic meditation pose, surrounded by a peaceful environment such as a Zen garden, filled with minimalist elements like raked sand patterns, stacked stones, and gentle bamboo stalks. To achieve a clean, minimalistic look, use simple line art with clear contours. The image should provide an opportunity for colorists to experiment with a muted, relaxing color palette, encouraging mindfulness and a meditative coloring experience. The complexity of the design should provide a moderate challenge for adult colorists. Use a composition that balances the figure with its surroundings to maintain a soothing aesthetic. Parameters: --ar 17:22 --v 5.2