Multiples of 5 sts + 2 (add 2 for base chains)
Row 1 (RS): Skip 3 ch (count as 1dc). 1dc into next ch, *ch3, skip 3 ch, 1dc into each of next 2 ch; rep from * to end, turn.
Row 2: Ch3 (count as 1dc), skip 1st st, *5dc into 2nd ch of next ch-3 arch; rep from *, ending 1dc into top of tch, turn.
Row 3: Ch3 (count as 1dc), skip 1st st, 1dc into next dc, *ch3, skip 3 dc, 1dc into each of next 2 dc; rep from * to end, turn
Repeat rows 2-3 to reach desired length.
