Round Rippled Afghan Pattern help

Im having trouble understanding the 3rd round on this pattern

Rnd 3: Ch 3, *skip next st, 1dc-ch1-1 dc in next st(V-st made). Repeat from * ending with 1dc in same sp as ch 3, ch 1, this completes the last V-st. sl st to join. (12 Vs-dc)

if anyone can help and explain, i would be very greatful.