I love that block, Here are my directions fairly simple. If i can not explain for your understainding let me know i will draw a picture then send to you.
You need 5 5" squares,
One square you will fold in half,
place the folded peice between two squares, now stitch the folded peice which is placed in top corner with fold side in . now sew the three peices together on one end then place the other end of the folded peice between two square,
this time pin the folded square at the front edge of the squares then sew together.