Tatted Edging #52 shuttles.
1st large ring- 4ds, 6p sep by 2ds, 4ds, close.
Make near this ring a small one- 4ds, p, 4ds, close.
Make a chain of 5ds, p, 5ds, join to picot of small ring.
2nd large ring- 4ds, join to last p of 1st large ring, 2ds, 5p sep by 2ds, 4ds, close.
Continue in this fashion until desired length.