Running a specific program when the system is idle, and terminating it on user input

I have a number of Ubuntu "Kiosk" systems that people can walk up to and use to access a specific website to enter specific information. As is, the screens go blank after 5 minutes of non-use. I would however like to change this behavior. My organization runs a digital signage application called XIBO, which has a Ubuntu client. I would like the systems to run that instead of blanking the screens when the kiosks haven't been used for 5 minutes. I'd prefer to use the Ubuntu XIBO application since I have a lot of installations and I want to synchronize content using that system. I looked into programs like xscreensaver to do this, but there doesn't seem to be a good way to accomplish this. Just finding idle time and doing something seems to be a bit of struggle. Am I missing some obvious methods to accomplish this ?