I think detention went well but I hope I never have to do it again.
How did you land in detention in the first place?
I threw a paper airplane and it hit a teacher.
Detention is set up so that kids who break the rules at school take some time to think about what they have done wrong.  If you don't want to ever go through with it again, think about why you broke the rules, and how you can avoid it in the future.
I know. I really don't want to do it ever again.
It is good that you have seen the error of your ways and don't want to go back again. Time is better spent in school learning.