Chop watermelon, and grapes into halves and keep in freezer for 2 hrs. Then add into big strainer.

Mash with hands and strain the juice.

Now add all dry ingredients into watermelon's juice. And add lemon juice to it. Soak takmaria /basil seeds into regular water for 8-10 mins.

Add soaked takmaria/ basil seeds into watermelon's juice and mix well.

Add into glass, and add 1spoonfull of powder sugar into glass. And adjust sweetness as per your taste.