12 Layer Rainbow Dessert

6 (3 1/2 oz.) pkg. jello (different flavors)
vanilla ice cream

Dissolve 1 package jello in 1 cup boiling water. Take 1/2 the mixture and add 1/2 cup cold water. Pour into 9 x 13-inch pan. Refrigerate to set. Next, put 2 heaping tablespoonfuls of vanilla ice cream in a dish to melt. Mix the remaining half of the jello with melted ice cream. Pour over set mixture in refrigerator. Repeat over until you have 12 layers. Top with Cool Whip. Very beautiful when finished.