Other Script for deleting Logs in the log folder

Hi guys I need all of your help,
Iam looking for a script for Cron, which can I use for automising the purifing of the DNS-logs in the log folder of my companies freebsd DNS server. Iam new to Freebsd coming from linux so please have some indulgence with me. :)
Yep, that would be the preferred solution, it has the same function as Linux' logrotate. Our newsyslog(8) can, despite its name, also rotate non-syslog logs.