Put one cup of water in your Pyrex measuring cup and boil the water in your microwave. I used the two-minute setting for this.
Carefully remove the measuring cup from the microwave and add one package of gelatin. Stir until it is completely dissolved.
Then measure out ¾ cup of the jello into a second container. To this container, add 1/3 cup of sour cream and whisk until it is smooth.
To the remaining jello, add 2 TB of cold water and mix.
Pour this into a 9X13 clear baking dish and refrigerate until set.
After 30 minutes, pull your dish out of the refrigerator and pour the sour cream mixture over the first layer.
Place the dish back into the refrigerator for another 30 minutes to set.
Wash your measuring cups and prepare the next layer of jello the same way you made the first layer -- one cup of solid color jello and one mixed with sour cream.
Pour the clear jello mix over the top of the set layers. Then half an our later, add the sour cream mixture.
Keep repeating this process until you have all the layers done.
Cover with foil and refrigerate.