Start with a magic ring.
R1: 3 ch, 10 dc in the ring. 1 ss in the first st.
R2: 3 ch, 7 popcorn stitches, 3 ch, 1 ss, 1 ch. Cut the yarn and leave a tail
R3: In the middle of the 3rd and 4th set of popcorn stitch on R2: 3 ch, 1 popcorn stitch.
Then in the middle of the 4th and 5th set of popcorn stitch: 1 popcorn stitch, 3 ch, 1 ss, 1 ch. Cut the yarn and leave a tail
R4: In the middle of popcorn stitch on R3: 1 popcorn stitch, 3 ch, 1 ss, 1 ch. Cut the yarn and leave a tail