UK / US crochet term:

Chain stitch – ch

Double crochet / Single crochet – dc / sc

Half treble / Half double crochet – h.tr / h. dc

Treble / Double crochet – tr / dc

Foundation Chain: Multiples of 10 + 7

Row 1: work 1 dc/sc in tenth ch from hook, 4 ch, 3 ch miss, 1 dc/sc in next ch, 3 ch, 2 ch miss, 1 tr/dc in next ch, * 3 ch, 2 ch miss, 1 dc/sc in next ch, 4 ch, 3 ch miss, 1 dc/sc in next ch, 3 ch, 2 ch miss, 1 tr/dc in next ch; rep from *, turn.

Row 2: 1 ch, *1 ch, 6 tr/dc with 1 ch between in space of 4 ch, 1 ch, 1 dc/sc in tr/dc below; rep from *, turn.

Row 3: 3 ch, work 1 tr/dc in space of 1 ch 3 times, 2 ch, 1 dc/sc in next space of 1 ch, * 2 ch, work 1 tr/dc in space of 1 ch 6 times, 2 ch, 1 dc/sc in next space of 1 ch; rep from *, 2 ch, work 1 tr/dc in space of 1 ch 3 times, 1 tr/dc in last ch of previous row, turn.

Row 4: 3 ch, 1 dc/sc in last of four tr/dc below, 3 ch, 1 tr/dc in dc/sc below, * 3 ch, 1 dc/sc in first of sixth tr/dc below, 4 ch, 1 dc/sc in last of sixth tr/dc below, 3 ch, 1 tr/dc in dc/sc below; rep from *, 3 ch, 1 dc/sc in first of three tr/dc below, 2 ch, 1 h.tr / h.dc in last ch, turn.

Row 5: 3 ch, 3 tr/dc with 1 ch between in space of 2 ch, 1 ch, 1dc/sc in tr/dc below, *1 ch, 6 tr/dc with 1 ch between in space of 4 ch, 1 ch, 1 dc/sc in tr/dc below; rep from *, 1 ch, 3 tr/dc with 1 ch between in space of 3 ch, 1 tr/dc in the same space, turn.

Row 6: 3 ch, * work 1 tr/dc in space of 1 ch 6 times, 2 ch, 1 dc/sc in next space of 1 ch, 2 ch; rep from *, at the end work 1 dc/sc in last ch, turn.

Row 7: 3 ch, * 3 ch, 1 dc/sc in first of sixth tr/dc below, 4 ch, 1 dc/sc in last of sixth tr/dc below, 3 ch, 1 tr/dc in dc/sc below; rep from *, at the end work 1 tr/dc in last last ch, turn.

Repeat rows 2 - 7 until you have reached your desired length.