【正确答案】In ancient times，it was used for recording events，while now it is mainly used for decoration．

【答案解析】例中前一分句的时间状语“在古代”表明该分句应该用一般过去时，所以“用它来”译为it was used for。句中后一分句的时间状语为“现在”，故谓语动词用一般现在时(is used)。