How can we set s3 lifecycle rule to delete the files form S3 bucket!

I am trying to delete files form my bucket as two .csv files will be pushed in my bucket daily and i want to delete both files after 14 or 16 hours, and next day the same activity will be repeated as 2 new files will be pushed and then deleted.

i think it only delete the files which get older then 24 hours if i am not wrong!

any suggestion please!!