Hi, is it possible to use analysis to create or update an existing geofence (or multiple geofences)? If possible, how to do that?

My goal is to have a simple circular geofence and I would like to (re)set the coordinates and radius. So the if the gps sensor is on a different place, simply reset the coordinates of the geofence to the current place.
The radius would be something set by the end user as a setting.

Thanks!
Vincent