Prepare 1 (3 ounce) package each of orange, cherry and lime flavored Jello. Dissolve each flavor in 1 1/2 cups boiling water. Put each flavor in a separate 8 inch square pan or dish. Chill until firm. Cut into 1/2 inch cubes. Dissolve 1 (3 ounce) package of lemon Jello in 1 cup boiling water. Add 1/2 cup pineapple juice. Chill until it is slightly thickened. Blend in 1 carton (12 ounce) of Cool Whip. Fold in the Jello cubes. Line a springform pan with lady fingers. Put mixture in pan. Cool in refrigerator overnight. Run spatula around sides of pan. Gently remove sides. Serves 16.