Prepare Angel Food cake from box directions and add blue food coloring to the mix.
Bake cake per directions on the box.
While cake is baking wash and cut up strawberries into thirds.
When cake is cooled break into one inch pieces.
Using a bowl, add a layer of angel food cake, then a layer of whipped topping (make sure to thaw out first), then a layer of strawberries.
Repeat the layers until the top of the bowl.
Keep chilled until ready to serve.