R1 : 6 sc in a magic ring (6)
R2 : increase in each stitch of previous round (12)
R3 : (1sc, increase) : repeat 6 times (18)
R4 : In the back loop only : sc in each stitch of previous round (18)
R5 à 6 : In both loops : sc in each stitch of previous round (18)
R7 : (4 sc, decrease) : repeat 3 times (15)
R8 à 9 : sc in each stitch of previous round (15)
R10 : In front loop only : (4 sc, increase) : repeat 3 times (18)
R11 : In both loops : (2 sc, increase) : repeat 6 times (24)
Fasten off and weave in the ends.