That's interesting, never thought of doing it in embroidery (But then, I don't have an embroidery machine).
But for those who want to piece the card trick blocks in an easy-no-triangle method, see the tutorial at
http://www.quiltingboard.com/t-100648-7.htm
Page 7 is where the original pattern was translated to pdf. format, see if that works best for you. If not, follow some of the responses to other formats.
Jan in VA