1 box yellow or white cake mix
1 (3 oz.) pkg. strawberry gelatin
1/2 c. boiling water
1 1/2 c. milk
3 c. whipped topping
1 (3 3/8 oz.) pkg. instant vanilla pudding and pie filling
1 c. blueberries
1 1/2 c. strawberries, sliced
1/2 c. miniature marshmallows

Prepare cake mix according to package in 13 x 9 x 2-inch pan. Remove from pan; cool completely. Place cake on wire rack over sheet of waxed paper. Poke cake using fork or end of wooden spoon at 1-inch intervals. Dissolve gelatin in boiling water; slowly drizzle over cake. Chill 1 hour.

Prepare pudding according to package, using 1 1/2 cups milk, 1 cup whipped topping and 1/2 cup blueberries. Split cake horizontally in half. Fill with pudding mixture. Spread remaining whipped topping over top and sides of cake. Arrange remaining blueberries, strawberries and bananas on cake to resemble a flag. Place marshmallows around edge.