Here's a recipe that I think it what you describe. I usually make it in a 9x13 Tupperware container. It is a pretty salad with the different rainbow colors....thus the name:

Rainbow Jello Salad

I usually put 1 pkg of each flavor of Jello in a different bowl and line them up on the cupboard in the following order and add the water and evap. milk as listed:

Black Cherry - add 1-1/2 c. boiling water

Cherry - add 1 c. boiling water and 1/2 c. evaporated milk

Lime - add 1-1/2 c. boiling water

Lemon - add 1 c. boiling water and 1/2 c. evaporated milk

Orange - add 1-1/2 c. boiling water

Orange/Pineapple - add 1 c. boiling water and 1/2 c. evaporated milk

Wild Strawberry - add 1-1/2 c. boiling water

Begin with the Black Cherry Jello mixture as the first layer in the container. Place in the refrigerator and it will usually set up in about 20 min. Test carefully and when the surface is just congealed, very carefully spoon the 2nd layer on, etc. Be sure each mixture is room temperature before you add to the congealed mixture or you do not have an even layered look.
Hope this is clear.