Lightly grease one 12x18 inch or larger baking sheet.
In a large heavy saucepan, combine the water, sugar and corn syrup. Heat over high, stirring constantly with a heat resistant spoon, until all sugar is dissolved. Stop stirring and bring to a boil. Boil until a candy thermometer reads 310 degrees F (154 degrees C). Remove from heat.
When bubbling has ceased, stir in the flavoring and a food coloring. Spread into the prepared pan so that the candy is no more than 1/4 inch thick. Cool for 45 minutes in the refrigerator. Remove from refrigerator, crack into pieces and enjoy!