//Global Dependencies, variables and definitions.
  #include <MD_Parola.h>
  #include <MD_MAX72xx.h>
  #include <SPI.h>

  // Define the number of devices for each instance
  #define HARDWARE_TYPE MD_MAX72XX::PAROLA_HW
  #define MAX_DEVICES 24 // Total modules
  #define NUM_ZONES 6    // Total zones
  #define ZONES_PER_INSTANCE 2 // Zones per instance

  #define CLK_PIN   13
  #define DATA_PIN  11
  #define CS_PIN_P  10
  #define CS_PIN_Q  9
  #define CS_PIN_R  8
  #define SPEED_TIME 1
  #define PAUSE_TIME 250

  // Create three MD_Parola instances
  MD_Parola P = MD_Parola(HARDWARE_TYPE, CS_PIN_P, MAX_DEVICES / 3);
  MD_Parola Q = MD_Parola(HARDWARE_TYPE, CS_PIN_Q, MAX_DEVICES / 3);
  MD_Parola R = MD_Parola(HARDWARE_TYPE, CS_PIN_R, MAX_DEVICES / 3);

  // Define button pins
  #define BUTTON_PIN1 2  // Button for Zone 1
  #define BUTTON_PIN2 3  // Button for Zone 2
  #define BUTTON_PIN3 4  // Button for Zone 3

  // Global variables
  int counters[3] = {0, 0, 0}; // Initial counter values
  const char* pc[3] = {
    "Baris Atas", 
    "Baris Tengah", 
    "Baris Bawah",
  };

  // New string variables for user input
  String zoneNames[3];

  // String variables for each zone
  String 
  zone1Text = "Zone 1", 
  zone2Text = "Zone 2", 
  zone3Text = "Zone 3", 
  zone4Text = "Zone 4", 
  zone5Text = "Zone 5", 
  zone6Text = "Zone 6";

void setup(void) {
  Serial.begin(9600);
  Serial.println(F("[Parola Multi-Instance Zone Display Demo]"));

  pinMode(BUTTON_PIN1, INPUT_PULLUP);
  pinMode(BUTTON_PIN2, INPUT_PULLUP);
  pinMode(BUTTON_PIN3, INPUT_PULLUP);

  // Prompt user to enter initial string values for each zone
  for (uint8_t i = 0; i < 3; i++) {
    Serial.print(F("Masukkan bahan untuk "));
    Serial.println(pc[i]);

    while (true) {
      while (Serial.available() == 0) {}
      zoneNames[i] = Serial.readStringUntil('\n');
      zoneNames[i].trim();

      if (zoneNames[i].length() > 0 && zoneNames[i] != "0") {
        break;
      }

      while (Serial.available() > 0) {
        Serial.read();
      }
    }

    Serial.print(F("Name for "));
    Serial.print(pc[i]);
    Serial.print(F(": "));
    Serial.println(zoneNames[i]);
  }

  for (uint8_t i = 0; i < 3; i++) {
    Serial.print(F("Masukkan jumlah awal untuk "));
    Serial.println(zoneNames[i]);

    while (true) {
      while (Serial.available() == 0) {}
      int input = Serial.parseInt();

      if (input > 0) {
        counters[i] = input;
        break;
      }

      while (Serial.available() > 0) {
        Serial.read();
      }
    }

    Serial.print(F("Initial value for "));
    Serial.print(pc[i]);
    Serial.print(F(": "));
    Serial.println(counters[i]);
  }

  P.begin(ZONES_PER_INSTANCE);
  Q.begin(ZONES_PER_INSTANCE);
  R.begin(ZONES_PER_INSTANCE);

  P.setZone(0, 0, 3);  // Instance P: Zones 0 and 1
  P.setZone(1, 4, 7);

  Q.setZone(0, 0, 3);  // Instance Q: Zones 2 and 3
  Q.setZone(1, 4, 7);

  R.setZone(0, 0, 3);  // Instance R: Zones 4 and 5
  R.setZone(1, 4, 7);

  P.displayZoneText(0, zone1Text.c_str(), PA_RIGHT, SPEED_TIME, PAUSE_TIME, PA_PRINT, PA_PRINT);
  P.displayZoneText(1, zone2Text.c_str(), PA_LEFT, SPEED_TIME, PAUSE_TIME, PA_PRINT, PA_PRINT);
  
  Q.displayZoneText(0, zone3Text.c_str(), PA_RIGHT, SPEED_TIME, PAUSE_TIME, PA_PRINT, PA_PRINT);
  Q.displayZoneText(1, zone4Text.c_str(), PA_LEFT, SPEED_TIME, PAUSE_TIME, PA_PRINT, PA_PRINT);
  
  R.displayZoneText(0, zone5Text.c_str(), PA_RIGHT, SPEED_TIME, PAUSE_TIME, PA_PRINT, PA_PRINT);
  R.displayZoneText(1, zone6Text.c_str(), PA_LEFT, SPEED_TIME, PAUSE_TIME, PA_PRINT, PA_PRINT);}

void loop(void) {
  zone1Text = String(counters[0]);
  zone2Text = String(zoneNames[0]);
  zone3Text = String(counters[1]);
  zone4Text = String(zoneNames[1]);
  zone5Text = String(counters[2]);
  zone6Text = String(zoneNames[2]);

  bool buttonPressed = false;

  if (digitalRead(BUTTON_PIN1) == LOW) {
    counters[0]--;
    if (counters[0] < 0) counters[0] = 0;
    delay(200);
    buttonPressed = true;
  }

  if (digitalRead(BUTTON_PIN2) == LOW) {
    counters[1]--;
    if (counters[1] < 0) counters[1] = 0;
    delay(200);
    buttonPressed = true;
  }

  if (digitalRead(BUTTON_PIN3) == LOW) {
    counters[2]--;
    if (counters[2] < 0) counters[2] = 0;
    delay(200);
    buttonPressed = true;
  }

  if (buttonPressed) {
    for (uint8_t i = 0; i < 3; i++) {
      Serial.print(zoneNames[i]);
      Serial.print(F(" - Counter: "));
      Serial.println(counters[i]);
    }
  }

  P.displayAnimate();
  Q.displayAnimate();
  R.displayAnimate();

  for (uint8_t i = 0; i < ZONES_PER_INSTANCE; i++) {
    P.displayReset(i);
    Q.displayReset(i);
    R.displayReset(i);
  }

  delay(100);
}