Grandpa asked someone to write a poem on his birthday. What paper should he write on? Is it white or red?

If you want to write words or poems, use any color, preferably red or antique rice paper. If you want to write your birthday, don't use white. You'd better finish it and frame it. It's best to use antique things like birthdays, even if they are hung at home after birthdays, they are not conspicuous. Red is too conspicuous.