1. Take 3 grams of butterfly pea flowers and soak them in boiling water
2. Pour butterfly pea flower water into the mold and freeze into ice cubes for later use
3. Spread a layer of white smoothie on the bottom of the cup
4. Cut the lemon in half, squeeze out the lemon juice, and pour into the glass
5. Make a smoothie with blue ice cubes, top with blue smoothie, pour in Sprite, and decorate with lemon slices.
