Pin the center seam in the second row together and sew.
This is how it should look. All 6 seams should meet in the center. Next add the three blocks on the third row in the same manner. Check to make sure all your seams meet up.
When all 6 blocks are assembled in the tower then press all outside seams around the back of the freezer paper.
The view from the front with the seams pressed to the back.
