Ribbon salad

Dissolve jello in separate bowls using 1 cup boiling water for each flavor. Stir marshmallows into lime jello and set asides. Add 3/4 cup cold water to lime jello. Pour into a 9x13 pan chill until set but not firm. Add 3/4 cup cold water to raspberry jello: set aside . Then chill lemon jellos until slightly thickened. Blend in Dream whip. Fold in crushed pineapple. Chil until very thick, spoon gently over lime jello. Chill until set but not firm. Mean while chill raspberry jello until thickened pour over lemon jello. Chill until firm.