Hopefully this isn't a duplicate post, but I found what seems to be a great tool to help easily create a launchd.plist.
Question
Launched - A launchd.plist generator
+8
+35@bgreeno, looks ok.. But on a cursory glance is more limited than: https://www.peterborgapps.com/lingon/
Enter your E-mail address. We'll send you an e-mail with instructions to reset your password.