Its an easy technique, especially if you are a beginner in quilting.
Watch the video tutorial below to learn this technique.
(Youre going to cut the whole thing.)

Image credits: Missouri Star Quilt Company via Youtube
Stack them separately, then take the little pieces and flip them, right side down.
After sewing the first pair, grab the next one and just line them up.
After you.ve sewed 3 pairs, take them to your ironing board, and press them open.

Do this to the rest of the blocks.
Just see to it that you sew all of them first before cutting.
double-check they are all lined up nicely.

After this, lay all the blocks together, and sew them.