Neapolitan Refrigerator Sheet Cake

1 pkg cake mix
Jell-O (4 serving size){1 pkg}
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)