Spray a 13x9 pan with non stick spray.
Make cake according to box directions.
Allow cake to completely cool.
Using a skewer, poke small holes all over the cake, piercing all the way to bottom.
In a bowl, combine 1 package of Jell-O and 1/2 cup boiling water and stir until gelatin is completely dissolved.
Add 1/2 cup cold water, mix well and slowly pour this mixture over the entire cake.
Chill for 30 minutes.
Trim and slice strawberries.
In a bowl, combine other package of Jell-O and 1/2 cup boiling water and stir until gelatin is completely dissolved.
Add 1/2 cup cold water, mix well.
Add sliced strawberries to Jell-O and allow to cool for 5-10 minutes.
Pour this mixture over the entire cake.
Chill for 1 hour.
Spread whipped topping over cake.
Cover and refrigerate for several hours hours.