Prepare space in the refrigerator for your Jello Cake.
Using cooking spray or coconut oil, grease 9 by 13 inch baking pan then using paper towel gently wipe off the excess.
Take 1 envelope of unflavored gelatin and sprinkle into a small bowl. Add 1/4 cup very cold water and stir it with a spoon to blend. Wait one minute then add 1 cup boiling water and 1 package of jello. Gently mix it all together until jello dissolves. Pour it into the baking pan then place it in the fridge for about 20-30 minutes.
Now lets make your white layer: Sprinkle 2 envelopes unflavored gelatin into a bowl. Add 1/2 cup very cold water stir it with a spoon then wait for a minute.
Take another bowl, mix 1 can of condensed milk with 1 cup boiling water. Pour it into the gelatin mixture then add 1/2 cup boiling water gently mix it with a spoon then set aside to cool for 10 - 20 minutes.
Take out your jello pan out of the fridge then slowly pour 1 cup of the condensed milk mixture all over the top. Move the pan around so the mixture can cover jello then place it in the fridge for another 20 to 30 minutes (each batch of condensed milk mixture is plenty for 2 to 3 layers).
Repeat step 2,3,4,5 until you have 5 red layers of jello and 4 layers of white cream. Keep in refrigerator for 1 to 2 hours before serving.