#include <MD_Parola.h>
#include <MD_MAX72xx.h>

const byte buttonPin = 2;  // the pin that the pushbutton is attached to

char const* const names[] = {
  "1",
  "2",
  "3",
  "4",
  "5",
  "6",
};

size_t const names_count = sizeof(names) / sizeof(names[0]);

#define HARDWARE_TYPE MD_MAX72XX::FC16_HW
#define MAX_DEVICES 4

#define CLK_PIN 13
#define DATA_PIN 11
#define CS_PIN 10

MD_Parola P = MD_Parola(HARDWARE_TYPE, DATA_PIN, CLK_PIN, CS_PIN, MAX_DEVICES);

void setup() {
  P.begin();
  pinMode(buttonPin, INPUT_PULLUP);

  while (digitalRead(buttonPin) == HIGH)
  delay(100);
}

void loop() {
  if (P.displayAnimate()) {
    static uint8_t state = 0;

    if (state == 0) {
      P.displayText("Incoming wisdom...", PA_CENTER, 25, 0, PA_SCROLL_LEFT, PA_SCROLL_LEFT);
      ++state;
    } 
    
    else if (state == 1) {
      delay(1000);
    
      static size_t index = 0;
      P.displayText(names[index], PA_CENTER, 25, 0, PA_SCROLL_LEFT, PA_SCROLL_LEFT);

      state = 0;

      if (++index == names_count) {
        index = 0;
    
      }
    }
    {
      while (digitalRead(buttonPin) == HIGH)
      delay(100);
    }
  }
}