#include <MD_MAX72xx.h>
#define HARDWARE_TYPE MD_MAX72XX:: DR0CR0RR1_HW
#define NUM_OF_MATRIX 1

#define CLK_PIN   8
#define DATA_PIN  6
#define CS_PIN    7

MD_MAX72XX mx = MD_MAX72XX(HARDWARE_TYPE, DATA_PIN, CLK_PIN, CS_PIN, NUM_OF_MATRIX);

void setup()
{
mx.begin();
}

void loop()
{
mx.setPoint (0,0,1);
mx.setPoint (7,7,1);
mx.setPoint (0,7,1);
mx.setPoint (7,0,1);
delay(2000);

mx.setPoint (0,0,0);
mx.setPoint (7,7,0);
mx.setPoint (0,7,0);
mx.setPoint (7,0,0);
delay(1000);

mx.setPoint( 3, 3, 1);
mx.setPoint( 3, 4, 1);
mx.setPoint( 4, 3, 1);
mx.setPoint( 4, 4, 1);
delay(2000); 

mx.setPoint( 3, 3, 0);
mx.setPoint( 3, 4, 0);
mx.setPoint( 4, 3, 0);
mx.setPoint( 4, 4, 0);
delay(2000);

}