This is a cake that I made for a party at my home on the 4th of July. I doubled my standard white cake recipe, and poured it onto two cookie sheets, to make a traditional sheet cake. It's frosted and filled with homemade cream cheese frosting, and adorned with blueberries and raspberries. Using the left over frosting, I piped stars in between the raspberry stripes. To make sure that I had 7 red stripes and 6 white stripes, I measured the width of the cake and divided by 13. Then I made marks with a toothpick at the appropriate intervals.