#include <MD_MAX72xx.h>

#define HARDWARE_TYPE MD_MAX72XX::FC16_HW
#define MAX_DEVICES 3
#define DATA_PIN 23
#define CS_PIN 21
#define CLK_PIN 18

unsigned long cas = 0;

int interval = 1000;
bool state = 0;


MD_MAX72XX mx = MD_MAX72XX(MD_MAX72XX::PAROLA_HW, CS_PIN, MAX_DEVICES);

int A[8][24] {
  {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
  {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
  {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
  {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
  {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
  {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
  {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
  {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
};

void setup() {
  Serial.begin(115200);
  mx.begin();
  mx.clear();
  randomSeed(analogRead(0));
}

void loop() {
  if (millis() > cas) {
    state = 1;
    for (int i = 0; i < 8; i++) {
      for (int j = 0; j < 24; j++) {
        mx.setPoint(i, j, A[i][j]);
      }
    }
    cas = millis() + interval;
  }

  if (state == 1) {
    for (int i = 7; i > 0; i--) {
      for (int j = 0; j < 24; j++) {
        A[i][j] = A[i - 1][j];
      }
    }

    for (int i = 0; i < 24; i++) {
      int a = random(0, 101);
      if (a > 70) {
        A[0][i] = 1;
      } else {
        A[0][i] = 0;
      }
    }

    state = 0;
  }
}