Just a suggestion. Square up the blocks, Use complementary fabric for sashing and maybe put in corner stones. When you have it quilted that is when you will see the difference in the quilt. Have the quilt quilted in the wings and also in the body of the butterfly and outline the butterfly. When the body is quilted, you can have the stitching make the separation between the body and the head of the butterfly. There are a lot of good suggestions being offered. Combine all the ideas and pick out the one you like the best. Hope you post the finished project.