This is standard functionality for Qlik Sense Desktop. You could achieve this in two possible ways.
You could create a web mashup and embed the Qlik Sense objects in the 'webpage'. Since you are using Qlik Sense Desktop everything would need to be local to the machine. If you launch Qlik Sense Desktop and then navigate your browser to http://localhost:4848/workbench you can create a mashup there. At this point it is just webpage coding to make the display change. Note if you were to upgrade to Qlik Sense Enterprise then you would be able to delivery the mashup over the internet (or intranet).
Your other choice would be to use/create an extension that changes the sheet on a timer. I am not personally aware of one that exist but there may be something on qlik.brank.com
I hope this helps,