It might be her own pattern. There's a similar pattern on moda bakeshop.
You can draw it on graph paper if you don't know how to use EQ.
I would start with a 8 or 9 or 10" square for the big one. The triangle
width plus side of the square plus sashing should total the big square.
Hope this helps.
Forgot to insert the link.
http://www.modabakeshop.com/2011/09/...pal-quilt.html