Applying the appropriate parameters, draw a butterfly of white color, looking like that one from next image.
Blending Options-Outer Glow

Blending Options-Stroke

Turn the butterfly over, selecting the usual option for this manipulation – Free Transform

Make twenty – seven copies of the butterfly’s layer, the way we did with the star’s layer. Apply next the Free Transform option to change the size of each copy, for them to look exactly the same way it is indicated below.

The final result!

View full size here.