Ready? Okay! Now we close the open seams... with (surprise surprise) strips!
and casually ww will cover the uncorrect points of the inner ray...
For the points i make orange diamonds on the same way like the inner little blue star. Sewing grid-diamond on the right side of fabric, cutting the edges, turning over through a cut in the grid. Okay? Okay!
For the seam-cover stripes you can take bias tape.