Neapolitan Refrigerator Sheet Cake

1 pkg cake mix
1 pkg Jell-O (4 serving size)
0.75 cup boiling water
1 cup cold water
1 envelop Dream Whip
1 small pkg instant pudding
1.5 cups cold milk
1 tsp vanilla

Bake cake mix in 9x13 pan. Dissolve Jell-O in 3/4 cup boiling water. Add one cup cold water and set aside. Once cake has cooled, poke holes deep through top of cake about 1 inch apart and slowly pour Jell-O mix into the holes. Refrigerate cake.

Topping

Mix envelop of Dream Whip, instant pudding, cold milk and vanilla until stiff. Immediately frost cake. Store in refrigerator. (Especially good with lime Jell-O and lemon pudding)