This is just a ‘fun’ variation of the regular chevron stitch. The stitch technique remains same, but creates an asymmetric effect. 

You need to know the chevron stitch to be able to understand this tutorial. 

staggered_chevron_stitch Fig 1: Follow the chevron stitch technique, but don’t keep between two stitch lines. Bring about a disorganization in the stitch to create this effect.