// Define pins for rows and columns
const int rows = 8;
const int cols = 8;

int rowPins[rows] = {2, 3, 4, 5, 6, 7, 8, 9};
int colPins[cols] = {10, 11, 12, 13, 14, 15, 16, 17};

void setup() {
  // Set up row pins as OUTPUT
  for (int i = 0; i < rows; i++) {
    pinMode(rowPins[i], OUTPUT);
    digitalWrite(rowPins[i], LOW);
  }

  // Set up col pins as OUTPUT
  for (int i = 0; i < cols; i++) {
    pinMode(colPins[i], OUTPUT);
    digitalWrite(colPins[i], HIGH);
  }
}

void loop() {
  // Display each row in sequence
  for (int row = 0; row < rows; row++) {
    // Turn on the current row
    digitalWrite(rowPins[row], HIGH);

    // Turn on LEDs for the current row
    for (int col = 0; col < cols; col++) {
      digitalWrite(colPins[col], LOW);
      delayMicroseconds(50); // Adjust the delay as needed for brightness
      digitalWrite(colPins[col], HIGH);
    }

    // Turn off the current row for the next iteration
    digitalWrite(rowPins[row], LOW);

    delay(5); // Adjust the delay between rows
  }
}