Just want to know, what is the proper procedure for someone having a seizure?

ABC. First thing you start screaming for help. Then make sure by getting close to victim you are not endangering yourself.When you feel you are safe can check if victim is breathing, then make sure it has a pulse too. Try to provide protection to victim while seizing without exposing yourself to unnecesary risks.
Avoid injury. Position pt. To avoid injury, do not insert any thing in mouth. Call 911.