Prepare each of the 3 Jellos separately following the directions on the box using 1/2 cup less water than what is asked for (for each flavor), this is to make the Jello firm. Pour each in their own 8 x 8 square mold and chill. Once chilled, cut the Jello into squares and keep cool.
Heat the condensed milk with 2 cups of water until it is ready to boil. Remove from heat and stir in the vanilla and let it stand. Dissolve four packages of unflavored gelatin in 1 cup cold water. Let stand for 1 minute. Pour gelatin mixture in your condensed milk stir and let it cool completely do not allow this mixture to set.
Once the milk mixture is cooled, place your Jello squares into either a bundt pan or a 9 x 13 cake pan. Pour in the milk mixture and chill.
