<https://s.mj.run/h-13ixEFQZk> Design a minimalist tattoo for the spine, featuring two delicate koi fish swimming gracefully along a vertical line. The koi fish should have fine, flowing lines, with subtle details to represent movement, like gentle curves and water accents. The overall style should be thin and minimalist, with no shading, using only thin black lines. The fish should face each other at different points along the spine, as if they are in a continuous dance. Include minimal decorative elements such as small waves or abstract swirls, but keep the focus on the simplicity and elegance of the koi fish design, following the natural curve of the spine