Originally Posted by
RST
Consider making a bunch more twister blocks? You could add scrappy twister bits even with the white deal you've got going there-- it would end up feeling like an internal frame effect and could look kind of cool.
I would make a border from twisters using the same white fabric at the edges. Then, if it still isn't big enough, repeat the twister border but a little wider that time. Like RST said, it will be self-framing.