Spray dessert cups or 8×8 or 9×13 glass baking dish with cooking spray. Set aside.
Boil 6 cups of water and keep on low.
6 cup water
Prepare the cherry gelatin as directed, adding two extra packages of unflavored gelatin.
6 oz cherry gelatin, 1.5 oz unflavored gelatin
Pour the cherry mixture into the prepared cups or dish pan and allow it to set in the fridge for about one hour.
Prepare the white layer by combining 2 packages of unflavored gelatin with 1 cup cold water. Next, mix the sweetened condensed milk with 1 cup boiling water and combine with the gelatin mixture.
1 cup water, 14 oz sweetened condensed milk
Allow to cool a bit before pouring over the red layer, then place in the fridge until completely set.
Prepare the watermelon gelatin as directed, adding two extra packages of unflavored gelatin.
6 oz watermelon gelatin
Allow to cool slightly before pouring over the white layer and place in the fridge until completely set.
Repeat the process until the desired amount of layers are achieved and everything is completely set.
If you use a pan instead of the cups, turn the gelatin out onto a cutting board and cut into hearts or squares before serving.