Cheesecake Flag Cake 4th of July

Ingredients:
For the crust:
1 1/2 cups finely crushed graham cracker crumbs
6 tbsp melted butter
1/4 cup white sugar
2 tbsp unsweetened cocoa powder
For the filling:
2 cups (1 pound) cream cheese (I used half regular and half mascarpone)
2 tsp grated lemon zest
2 tsp lemon juice
1 tsp vanilla extract
1 1/4 cups cold heavy whipping cream (36% fat)
1/3 cup white sugar