For each flavor, dissolve one box of jello in one cup of boiling water. Pour into a container and chill until firm.

After chilling the four flavors, cut them into small blocks.

Carefully mix the blocks in a 9 x 13 pan.

In a separate bowl, sprinkle 2 envelopes unflavored gelatin into 1/2 cup cold water. After the gelatin blooms, add 1 1/2 cup boiling water and dissolve. Add the can of condensed milk. Stir and cool. Pour cooled milk mixture over jello and chill overnight.

Cut into blocks or shapes and serve!