How to do it:
Make a ring
1° r: work inside the ring *1 s.c, 3ch., 2 d.c, 3 ch.* Rep from * to * 3 times. Close round with 1 s.t
2° r: *1 s.c up behind, stung on s.c from previous r., 4 ch.* Rep. from * to * 3 times.
3° r: * 1 s.c stung on s.c from previous r., 3 ch, 3 d.c, 3 ch.* Rep from * to * 3 times, close round with 1 s.t and 1 ch. to finish it.
-ch: chain stitch
-s.t: Slip Stitch
-s.c: Single Crochet
-d.c: Double Crochet