This is a pretty nifty little flagstone tessellation that I recently thought up and folded.  Basically, it's a series of long parallelograms connected in a recurring wave formation.  The same pattern can be done with rhombuses. And has been done, by others and myself. But it has a different, cooler look when you use the longer shapes.  It's an intricate looking design that uses a fairly simple pattern.  On the back side, it's all triangle twists.  Most flagstone tessellations don't back light very well, but this one does.  It's a moderately difficult tessellation . If only because it requires so many creases.  I have a crease pattern. Just need to add it.  Although, it's not at all difficult to discern how to fold it.