Two Contrasting Patterns

Brief

Please enter your best photos containing just two contrasting patterns. The images must show only two contrasting patterns, not different colours of a similar pattern. The subject of your composition can range from man-made architectural structures and textiles, to contrasting patterns found in nature such as rocks and the sea. However your composition must contain a clear divide between the two contrasting patterns. Entries can be in colour or monochrome. I would like to reward mostly creativity, so I am looking forward to seeing your compositions.