The blue flower is a ruffled rose.
Like making it into a point.
Thread needle through, like so.
See how gathering the end made the center of the rose look pulled in?
This is the bottom and you just keep securing as you roll the rose.
You can check that out also.
Go ahead and experiment, you will see the different looks you can get.
Oh, well, I'll try again next time.
I could have put in a zipper, but these pillows aren't going to be "used".
They are just for decoration.