Ask HN: How do I aggregate social media accounts and show the result on a monitor?

Say I want to set up a large LCD monitor that shows the aggregated social media feeds by the water cooler at a company. I'd want a self hosted solution of something like https://www.juicer.io/ that preferably runs a on a Raspberry Pi.

I doesn't have to be served to the net, but it should rather just be shown on this monitor/display.

Ideas?