Free double crochet group stitch pattern.
Video tutorial :
Ch an odd number of sts.
Row 1: Dc in 5th ch from hk ,dc in same ch, *sk 1 ch, 2 dc in next ch; rep from * across to last 2 ch, sk 1 ch, dc in last ch, turn.
Row 2: Ch 3 ,2 dc btw next 2 dc group across, dc in top of t-ch, turn.
Repeat Row 2 for pattern.