#include <LedControl.h>

// LedControl(DIN, CLK, CS, number of devices)
LedControl lc = LedControl(11, 13, 10, 1);

void setup() {
  lc.shutdown(0, false);  // Wake up the MAX7219
  lc.setIntensity(0, 8);  // Brightness (0–15)
  lc.clearDisplay(0);     // Start clean
}
 
void loop() {
for (byte riga = 0; riga < 8; riga++) {
    lc.setLed(0, riga, 7, true);
  }

for (byte col = 0; col < 8; col++) {
    lc.setLed(0, 0, col, true);
  }
}