I want to instruct little bit about this pattern. First I made higher section of yolk. I use double crochet stitch in a first round and within 2nd round I take advantage of half of double crochet stitches. Each stitch has three loops. On this pattern I worked into the back loop. Back loop work is easy and neatly to appear. If you wish to make a big dimension, so increase the round into the yolk and don’t change into the pattern. Comply with the same way in more rounds.