Next sew a Color 3
small square to the side of a Color 2/Color 3 half square. Make four of these
units...
Join two together again
using a 1/4" seam. Make two of these units...
And now piece your
block, by sewing a four square unit to a half square unit using the same 1/4 " seams.
Make another of these pairs; sew them together....and that's it!