In the Arduino world, programs are called sketches. In essence, our sketch only needed to do two things.
1) Make an HTTP request to an endpoint we set up to return a message.
2) Relay that message to our LED matrices in the correct format.
In writing our sketch, we worked mostly from two examples.
1) An example sketch for the Yun makes request to an endpoint and does something with the response
2) An example sketch for the NeoMatrix library that scrolls text across an LED matrix
By mashing those two sketches together, we got our infoTicker sketch.