Make layers of gelatin in one 7" x 11" glass pan, sprayed lightly with Pam.
For each colored layer, mix until gelatin is dissolved:
3 oz. flavored gelatin + 1 envelope Knox gelatin + 1 cup boiling water
To make white layers, combine until gelatin is completely dissolved:
1 c. boiling water + 2 envelopes Knox gelatin
Add: 1 can sweetened condensed milk
Divide mixture into three equal parts.
Cool in freezer or refrigerator until set, one layer at a time (make sure pan is level). After last layer is set, store in refrigerator.
Add layers in this order: Lime (on bottom of pan), White, Lemon, White, Orange, White, Strawberry (on top)
-Use microwave oven to heat water and gelatin
mixture if gelatin does not completely dissolve
or if the mixture sets before it is added;
-Make sure each layer is fully set before adding
the next one.
-Only add the new layer of gelatin mixture if it is
slightly warm. If it is too hot it will melt the
lower layer and if it is too cold, it will be too
thick and/or lumpy to spread.