So, since we will be quilting as we go, we will also need to prepare the backing fabrics as we start.
You can use various fabric for backing, and one colour sashing like this:
(you'll need 9 pieces of 13.5" square, 1 yard of sashing fabric)
Or all the same for all blocks and another colour sashing.
(you'll need 1.5 yards for the blocks and 1 yard for sashing)
Other things you will need:
Quilting threads - either one colour or various - matching to your fabrics
9 piece of 13" square batting and 2.5 Strips of batting (start collecting scrap batting about that size from now or you can always cut the strips from the large batting piece anyway)
Free-Motion foot
Walking Foot
Standard Quilting Tools
An advantage if you have Supreme Slider and Machinger Gloves but not necessary