Clone a Deal when I change the stage to Closed Won

Clone a Deal when I change the stage to Closed Won

Hi There,

We want to automate cloning a deal when the stage is changed to closed won - this is because all our deals will have a renewal in 12mths so we generate another deal with a closing date of 12mths hence.

We have tried to use workflows or layout rules but neither offer this.

can anyone suggest another way?

Thanks Dale