this example starts with a fern border design. embellish it by stitching the design but adding vein lines, micro quilting, and tendrils around the leaves, or stitch around the leaves with feathers, with or without pebbles.
How to build your own mandala. Look for radial symmetry of 8 or Mandalas can be created on paper, in the earth, or by using repeating found objects such as leaves, twigs and flowers. (Mandalas can be many things, yknoww)