Design an adult coloring page that promotes meditative and mindful thought through calming, flowing patterns. The illustration should feature symmetrical and organic shapes like mandalas, waves, or spirals, using smooth, continuous lines to guide the eye across the page. Include natural elements such as leaves, feathers, or abstract floral patterns, arranged in a balanced, repetitive layout that encourages relaxation. Avoid harsh angles or overwhelming details, focusing instead on gentle, flowing forms that create a sense of calm. The overall design should invite slow, thoughtful coloring, fostering a peaceful, meditative state.