int DATA_PIN = 2;
int CLOCK_PIN = 3;
int LATCH_PIN = 4;

MatrixClass matrix;

void setup()
{
    matrix.init(DATA_PIN, CLOCK_PIN, LATCH_PIN);
}

void loop()
{
    matrix.clear();
    matrix.setHigh(1, 1);
    matrix.setHigh(2, 2);
    matrix.setHigh(3, 3);
    matrix.setHigh(4, 4);
    matrix.setHigh(5, 5);
    matrix.setHigh(6, 6);
    matrix.setHigh(7, 7);
    matrix.setHigh(8, 8);
    matrix.display();

    delay(10);
}