Ouh! It looks like... a star!
That's the moment for sewing togehter the singele rays. Pay attention to the open seams between outer ray and blue fabric.
Ready? Okay! Then we close the inner hole now!
I take a little scrap dark blue, a little scrap of the grid...
Cut your grid in to a little regular star, sew it on the right side of fabric, cut it out, cut the edges and make a little cut in the middle of the grid (only the grid, not the fabric)! And then turn over through the cut in the grid... (can you understand my terrible english?
)