Sorry, I don't know the name of this block ... it can take on different looks, dependent on keeping it in two fabrics, or choosing an assortment of fabrics.
Being that it's Thangles site, then you'd just use a bunch of HSTs.
Just draw out a square 6 blocks by 6, and shade in which way the HSTs need to face to make this one.
Then lay out your HSTs, and stitch them together in rows.