1. Put 1 single crochet stitch in the first double crochet stitch made on the tenth row.
2. Make 2 chain stitches.
3. Put 3 double crochet stitches in the same stitch where the 1 single crochet stitch was put.
4. Skip 2 double crochet stitches in the last row of double crochet stitches of the petticoat. Put 1 single crochet into the third stitch.
5. Make 2 chain stitches.
6. Put 3 double crochet stitches into the same stitch as the single crochet.
Continue in same way until scallops are made all around the petticoat.