"Generate a thumbnail featuring a photorealistic image of a sunrise or sunset over the ocean, symbolizing hope and the journey to mental well-being. The horizon should be clear, with vibrant colors that draw the viewer's eye, suggesting the idea that after darkness comes light. The image should be striking and evoke a deep sense of peace and optimism, making it immediately identifiable with healing and mental health recovery. Ensure the composition is simple, with a focus on the natural beauty and colors of the scene, chaos, 4k --ar 16:9 --niji 6