Custom Blocks: Sensing

The sprite asks you whether it is your birthday, accepting answers of 'yes' or 'no'. It then detects whether it is your birthday by running a custom predicate block returning the boolean value of whether the answer to the sprite's question was 'yes'. If so, it will cheer and exclaim, "It's your birthday!", otherwise asking you when your birthday is and saying, "I guess you still have to wait."