#include <LedControl.h>

// DIN, CLK, CS
LedControl lc = LedControl(11, 13, 10, 1); // 1 device

void setup() {
  // put your setup code here, to run once:
  lc.shutdown(0, false);   // Wake up MAX7219
  lc.setIntensity(0, 8);   // Set brightness (0–15)
  lc.clearDisplay(0);      // Clear display
}

void loop() {
  // put your main code here, to run repeatedly:
  // Draw a diagonal line
  for (int i = 0; i < 8; i++) {
    lc.setLed(0, i, i, true);  // (device, row, column, state)
    delay(100);
  }
  delay(1000);
  lc.clearDisplay(0);
}