When you activate a process instance, a timer will be set that will run the instance on a set interval until the instance is deactivated.
The time interval is defined when creating instances using Processes(), and can be later updated using instance.changeInteval().
If you want an instance to automatically become active when eventStartLevel() is fired, set autoActivate to true when creating it via Processes().
Note: By default, all instances are deactivated when the player associated with the script (me) is killed. If you don't want this behaviour for a specific instance set the autoDeactivate to false when creating the instance via Processes().