First the picture:
Then the explanation:
There are two simple blocks in this design. A quarter square triangle and a nine patch. The trick is to alternate the direction of the quarter square blocks in each row. That makes the square that appears to be on point be solid. If you put them all the same direction your quilt will look like this:
Not nearly as effective, it is? I did use the dark blue in all of my nine patches (remember this is just done in EQ5, I have NOT made this quilt - yet) However, you could alternate those also:
That gives more contrast in all the blocks, I also alternated the center of the 9 patch in this one too. Honestly the first one shown is easiest to make. Why, you can speed piece the 9 patch blocks by making strip sets and sub-dividing them. Also, I like the way the first one makes the corner and center square of the nine patch seem to float in the dark "on point" blocks.
If you wanted to get really wild with this, you could do applique blocks instead of the nine patches. Go ahead and see what YOU can come up with. Let your imagination run free!