16 oz. can red tart cherries in water
20 oz. can crushed pineapple in own juice
1 (4 1/2 oz.) pkg. orange sugar free Jello
1 (4 1/2 oz.) pkg. cherry sugar free Jello
1 (16 oz.) Diet Pepsi

Bring pineapple and juice to boil. Add both Jellos. Stir until dissolved. Take off heat, add cherries and juice. Add Pepsi. Will foam up. Stir until foam disappears. Chill in 9 x 13 inch or two 8 x 8 inch glass (preferably).