Hi Kahmeelyon,
This should be fairly easy. All you need to do is create a new alert in Advanced Alert manager with following Trigger Condition:
1) warning condition
Type od property to Monitor: [Transaction]
Duration is greater than 60
(such a condition will trigger alert for all transactions that comply with the condition. To specify a given transaction, use another condition e.g.:)
Name is equal to www.Google.com from Orion Server
(or as I would suggest, use TrasactionId instead)
2) Critical condition - just do the same thois time for 80s
Hope it helps
-Z.