Art Square quilt block

This block is actually based upon a four by four grid and it can be made either by making the triangle units from HST's and a small square and adding those to the large central square (useful if you don't want to cut a print) or making flying geese units for the sides and adding to a smaller central square.  The second method is easier to get accurate.

Cut and create uses the flying geese method

This version from Generations Quilt is in multiple sizes Art Square Quilt Block: Tutorial in 4 sizes

This  is another colour variation 

Patchwork Square uses it here and includes example quilt layouts. Art Square - Free Quilt Block Pattern

Other 4x4 blocks