That is a more difficult version than the directions I posted. I have adjusted your diagram to change the large center square and the Quarter Square Triangles in the corners so that the entire block is made out of Half Square Triangles according to the directions I posted earlier. I can figure out the math to do it the way your diagram shows but unless you're experienced with controlling the bias edges of triangles--I strongly recommend using the EZ method.
I'm attaching the instructions from Quilt Pro to rotary cut the block in both methods.
EZ Windblown Square--all HST's
[ATTACH=CONFIG]109706[/ATTACH]
Windblown Square rotary cutting
[ATTACH=CONFIG]109707[/ATTACH]
EZ Windblown Square rotary cutting
[ATTACH=CONFIG]109708[/ATTACH]