​Crochet Lacy Lattice Pattern

The quantity of sts is multiple 18 + 17.

Set-up row: 1 sc in second ch from hook, 1 sc in each ch across row, turn;

1^st row: Ch 4 (counts as dc, ch 2), skip first 3 sc, 1 dc in next sc, *ch 2, skip 2 sc, 1 dc in next sc, rep from * across, turn;

2^nd row: Ch 1, 1 sc in first dc, 1 sc in next space, ch 3, 1 sc in next space, *[2 dc, 4 tr, 2 dc] in next space (shell made), 1 sc in next space**, [ch 3, 1 sc in next space] 4 times, rep from * across, ending last rep at **, ch 3, 1 sc in next ch-2 space, 1 sc in second ch of turn ch, turn;

3^rd row: Ch 1, 1 sc in first sc, ch 3, 1 sc in next ch-3 space, *ch 3, skip next 2 dc, 1 sc in next tr, ch 3, skip next 2 tr, 1 sc in next tr**, [ch 3, 1 sc in next space] 4 times, rep from * across, ending last rep at **, ch 3, 1 sc in next ch-3 space, ch 3, 1 sc in last sc, turn;

4^th row: Ch 1, 1 sc in first dc, 1 sc in next space, ch 3, 1 sc in next space, *[2 dc, 4 tr, 2 dc] in next space (shell made), 1 sc in next space**, [ch 3, 1 sc in next space] 4 times, rep from * across, ending last rep at **, ch 3, 1 sc in next ch-2 space, 1 sc in second ch of turn ch, turn

Repeat 3^rd-4^th rows.