Workflow Rule If Certain Field not changed in X time

Workflow Rule If Certain Field not changed in X time

Hi,

I need help setting up a WFR for Contacts.

I have a Field called AH Level with Statuses AP1-AP8.

If the status is on AP1 or AP2 and the Status has NOT changed in 30 days it should Create a Task called "Contact Name has not changed Status in 30 days".

Thanks
Nic