custom Clickbot program needed

An old employee left our company stole all our secrets and has started his own business cometing with us. We? need a clickbot program to be written, it must search [login to view URL] for a certain keyword the we choose? then if it finds their domain? then it must click on that keyword then start again under a new proxy so its not detected as click fraud. you will need to test the program and we? must be? able to install in on one of our machines. this is to take out a competitor by increasing his google PPC costs we can squeze him out of the market ang get our customers back. I know there are already clickbots/ hitbots out there but this one needs to run 24/7 and change proxy