Hi and welcome. I understand the block on point with the 4 setting triangles, but have no clue what the center block is. As gingerd mentioned, it would be great if you could post a picture. There's a file size limitation so:
First do this:
http://www.quiltingboard.com/qb-help...g-t166655.html
Then do this:
http://www.quiltingboard.com/qb-help...s-t168819.html