Changing/cycling variables automatically

Hi, I created a dashboard in order to show data of different machines basing on variables; maybe I missing something, but I’m not able to find any way to cycle all the variables automatically so I can monitor all the machines divided by department; for example, every 5 seconds the dashboard changes the variable “department” from A to B automatically. Is that possible? Thanks!

P.S. I’m using latest Grafana 6.0.0