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 4 + 2

Row 1: 1 ch skip, * 1 dc/sc in next ch, 3 ch, make loop on hook more longer than usual (see picture below);

yarn over and insert hook in first of three ch, yarn over and draw through . You get 1 incomplete h.tr / h.dc;

work 1 incomplete h.tr / h.dc in next ch;

work 1 incomplete h.tr / h.dc in last of three ch;

work 1 incomplete h.tr / h.dc in dc/sc;

work 1 incomplete h.tr / h.dc in the same ch, where dc/sc was made;

work 3 incomplete h.tr / h.dc in next 3 foundation ch;

yarn over hook and draw through all loops;

work 1 ch; rep from *;

1 dc/sc in last ch, turn.

Row 2: work 3 ch, * 1 tr/dc in ch, 1 ch, 1 dc/sc in first of three ch, 1 ch; rep from*, 1 tr/dc in last dc/sc, turn.

Row 3: 1 ch, * 1 dc/sc in tr/dc below, 3 ch; work 8 incomplete h.tr / h.dc in next stitches: 3 incomplete h.tr / h.dc in next 3 ch, 1 incomplete h.tr / h.dc in dc/sc, 1 incomplete h.tr / h.dc in the same tr/dc, where dc/sc was made, 3 incomplete h.tr / h.dc in next 3 stitches of row below ( ch, dc/sc, ch) work 1 ch; rep from *; 1 dc/sc in last tr/dc, turn.

Repeat rows 2 - 3 until you have reached your desired length.