The instructions are written using US crochet terminology. The foundation chain is a multiple of 12 ... last rep with 2dc once only into last ch, turn. Row 2: 3ch (count as dc), 1dc into first ...

Chain (ch) 12 in main color (MC). Row 1: Double crochet (dc) in 3rd ch from hook and in each ch across (10 dc). Ch 2, turn. Rows 2-8: 1 dc in each dc across, ch 2 turn. On 8th row, fasten off.