It was really simple to make.
I got 1/2 yard of all 3 colors which will make more than 1 pillow. Once the fabric was washed and ironed, I started making pin tucks. I used pins to secure them, then I ironed them.
Just make a small fold, about 1/4-1/2 inch. I made sure the folds were wavy and after the first couple of rows it went really quick.
After a few rows, I would iron it on the wrong side, and then sew.
When I was done, I cut a strip from each color (mine were 7.5 inches) and sewed them together. Then I just cut the sides to make them straight. (As you can see, the sides are not even.)
Measured it and cut the same size square from extra fabric I had around. Sew the pieces together, right sides facing each other, just make sure you leave an opening for the stuffing.