Since I didn't really measure things, the following is just a loose recipe... adapt it to your tastes. I did measure the sugar and water for the simple syrup, though.
adapted from Food
1 1/2 cups water
1 cup sugar
3/4 cup fresh lemon juice (about 3 lemons)
the juice of 1 large orange
1/2 - 2/3 cup fresh lime juice, to taste (2-3 limes)
1 liter sparkling water, chilled
1. In medium saucepan over high heat, bring water and sugar to a boil. Boil for 1-2 minutes or until sugar is dissolved. Allow to cool, then put in a covered container in fridge and chill until cold (overnight is good).
2. In a large pitcher, combine fruit juices and sparkling water. Add simple syrup to taste (you may use all of it and you may not, depending on how sweet you want it). Add some ice and lemon or lime slices to garnish, if desired.
3. Serve immediately.
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