From the kitchen of Stephanie Knewasser.  I saw this on the
cover of a
Martha Stewart magazine.  I've used the
technique for Halloween spider webs, and liked the idea of
using red, white & blue for the 4th of July.
Make a batch of Sugar Cookies .
Make
Shiny Icing or Confectioner Sugar Icing.
On a small plate combine blue food coloring and a few drops
water.  Do the same with red food coloring.

Frost a cookie.
Using a small brush, paint circles on cookie.
Use a toothpick from center out, then outside to center.
Use a paint brush to add food coloring circles.
Drag a toothpick from the center of the cookie out.  Then drag the toothpick in
the other direction from the outside to the center.  Continue alternating lines.
Firework Cookies
"Inside every older person is a
younger person - wondering what
happened."