Lime Slush

4 cups sugar
4 cups water
1 pkg. (3 oz.) lime Jello
1 can (46 oz.) unsweetened pineapple juice
juice of two lemons
7 cups cold water

In saucepan, mix together sugar and water and boil for 5 minutes. Stir in Jello until dissolved. Pour in gallon container. Stir in pineapple juice, lemon juice and water. Freeze. Place in punch bowl and mix with 7-up until desired slush consistency.