Have a sleepover so everyone can spend the night and you can play the game when it’s dark. Make snacks and decorate with scary decorations to set the mood.   Make cookies that look like mirrors. You and your friends can draw what you think Bloody Mary looks like on the cookies using frosting. Hang up a black plastic table cloth on the wall and write "Bloody Mary" on it with red paint. Search online for “history of Bloody Mary game” or check out a book about the game from your local library. Read the history out loud to your friends before you play the game. No one knows for sure, but some people think that Bloody Mary is the ghost of the infamous Queen Mary I. Look online for documentaries about Bloody Mary or rent movies that are inspired by the legend. Watch the movies with the lights out to help get everyone scared before you play the game.  Watch "The Twisted Tale of Bloody Mary" to learn about Queen Mary I. Watch the scary movie "Candy Man." It was inspired by the Bloody Mary game. Pick out a silly board game you can play or choose a comedy movie you can all watch. You and your friends might be scared after playing, and a light-hearted activity will help calm everyone down.

TL;DR in Chinese:
邀请朋友来家里玩血腥玛丽。 阅读和血腥玛丽相关的历史。 观看以血腥玛丽为主题的电影。 游戏结束后，安排一些轻松的活动。