#include <LedControl.h>

LedControl lc = LedControl(9, 11, 10, 1); 

const int displayNumber = 0;

void setup() {
  lc.shutdown(displayNumber, false);       
  lc.setIntensity(displayNumber, 15);
  lc.clearDisplay(displayNumber);      
}

void loop() {
  lc.setLed(displayNumber, 0, 7, HIGH);   
  delay(1000);                
  lc.setLed(displayNumber, 0, 7, LOW);  
  delay(1000);               
}