R1: Use white yarn and start with 5 sc in the round. 1 ss, 1 ch
R2: Repeat (2 sc in next st) 5 times. 1 ss, 1 ch
R3: Repeat (1 sc, 2 sc in next st) 5 times. 1 ss, 1 ch
R4: Repeat (2 sc, 2 sc in next st) 5 times. 1 ss, 1 ch
R5: Repeat (3 sc, 2 sc in next st) 5 times. 1 ss, 1 ch
R6-7: Work 25 sc. 1 ss, 1 ch
R8: Work 8 sc, repeat (1 sc, sc2tog) 3 times, and finally work 8 sc. 1 ss, 1 ch
R9: Work 22 sc. 1 ss, 1 ch
R10: Change to black yarn, work 8 sc, then repeat (1 sc, sc2tog) 2 times, and finally work 8 sc. 1 ss, 1 ch
R11: Work 20 sc. 1 ss, 1 ch
R12: working 2 sc, then repeat (1 sc, sc2tog, 1 sc) 4 times, and finally work 2 sc. cut and leave a tail.