Once you’ve cut your 7 sets of strips, you’re ready to begin sewing your strip sets. You will be sewing dark sets and medium sets.
Sew one light strip between 2 dark strips and sew one light strip between 2 medium strips of the same color family. The light will always be in the middle and will be the same fabric on the dark and medium strip sets.
Below are my purple set and my green set. Notice both purple strips have the same center fabric as do the green. This makes the top of your cubes.