To crochet necklace: Ch77, sc in second ch from hook and in the next 3chs. Ch76, sc in the 4th ch at the beg of previous ch loop, and in next 3chs, ch1, turn. Sc in first sc and in next 3 sc, ch80, sc in the 4 sc at the beg of previous row, ch1, turn. Sc in first sc and in next 3 sc, ch84, sc in the 4 sc at the beg of previous row, ch3 and sl st on the other side of the same closure piece to make a button hole. Sew a button on the opposite closure piece of the button hole.
Crochet a flower of any kind to embellish the necklace, and sew it on the four chains strands. You can use the crocheted flower pattern from the <A href="http://www.craftfoxes.com/how_tos/three-strand-flower-headband-free-crochet-pattern">three-strand flower headband</a>.