Strawberry Syrup

Strawberry Syrup
Remember those strawberry picking days with the family when you were younger? We decided to take those memories and bottle them up into a delicious syrup. Its beautiful dark pink colour beckons to be used in a cool, refreshing cocktail recipe. Use this syrup to create your own fun cocktails such as a strawberry daiquiri, margarita or simply splash some in a vodka lemonade for a touch of rosy strawberry goodness. Simple, elegant, delicious flavours.
INGREDIENTS
2 Cups Water
1 Cup Sugar
Pint Of Strawberries (Or 1 lbs.)
DIRECTIONS
-Rinse strawberries and hull them out by cutting the stems/leaves.
-Slice strawberries about ¼ inch each.
-In a saucepan over medium-high heat, add the strawberries and the water.
-Bring to a boil and once boiling, bring down to a simmer.
-Cook the strawberries in water for about 20 minutes.
-With a spoon, skim the foam that floats while the strawberries cook.
-After 20 minutes, the strawberries should have lost most of their colour and the water should be a pink/red colour. After evaporation, you should have around 1 cup of liquid.
-Remove from heat.
-Using a strainer, strain the strawberries and collect the liquid in a saucepan.
-Note: Avoid pressing down on the strawberries as you strain as this will create a cloudy syrup.
-Put the saucepan of strawberry infused water over medium-high heat and add the sugar.
-Skim any extra foam that forms during the second boil.
-Stir until sugar is fully dissolved.
-Remove from heat and let cool.
-Store in a glass container and refrigerate.
Keeps about 1 week.

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If the water evaporate, should I add water in it？