Fancy Fold. . . Window Card . . .

I found a card online that I liked, but it had no directions.  So I thought that it would not be that hard to figure it out....boy was I wrong!  

Two hours, a ton of card stock, and a lot of frustration later; I finally figured it out.

Here is my card, looks pretty simple right. . . 
 

And here is how it opens . . .  

 

 And here it is all the way open . . . 

Pretty cool !