These blocks are so vibrant, so full of energy, they almost beg to be set on pointe, just to add to the sense of energy and movement. Then you could use half square triangles of almost any color (love that blue), or more than one color (which would be my choice, up to 3 colors) to fill in around your blocks. Then a very vibrant narrow border, something from the quilt that really stands out and is noticed. I'd think you'd have to get the top together before you could "audition" for this part. Then a wider border for the edge; I'm thinking one of the lighter colors from the top. Then just for fun, a binding made up of strips of all (or at least many) of the colors in the top. IMHO.