Press button on Particle Core = MP3 plays on specific webpage

Getting Started
5

Thank you.
I’ve taken the advice and written the following for the core (using info from this blog).
The switch is on D3 and is debounced - publishing to “sound1”

int last;
bool ready;

void setup() {
  pinMode(D3, INPUT);
  last = millis();
  ready = true;
}

void loop() {
  if (millis() - last > 200) {
    if (digitalRead(D3)) {
      // button pressed
      if (ready) {
        ready = false;
        Spark.publish("sound1");
        last = millis();
      }
    } else {
      // button released
      ready = true;
    }
  }
}

Where I get lost in on the HTML/Javascript side, especially how to cause the mp3 to play.
For instance am I on the right track on modifying this post. I’m so sorry I wasn’t sure how to integrate your above “spark/sparkjs/blob/master/examples/node/get-event-stream-forever.js” link to my HTML code.