Arduino - Matrix display & tipkalo

#include "LedControl.h"

LedControl lc=LedControl(12,11,10,1);
unsigned long delaytime=100;

void setup() {
  lc.shutdown(0,false);
  lc.setIntensity(0,8);
  lc.clearDisplay(0);

  pinMode(2, INPUT_PULLUP);
  attachInterrupt(digitalPinToInterrupt(2), pali, CHANGE);
}

int i=0, j=0;
void loop() {
}

void pali() {
  lc.setLed(0,i,j,1);
  i++;
  if(i>8) {
    i=0;
    j++;
    if(j>8) {
      j=0;
    }
  }
}