Automatically closing tasks on closed opportunities
So I am automatically creating tasks for opportunities so ie.
Opp0001 is created and automatically has :
Task 1 - Call client in 3 days
Task 2 - Write to Client in 6 days
If the Opportunity is won on Day 4, I would like Task 2 to automatically be marked as completed because I don't need it any more. Any thoughts on how to do this automatically?