int katodaLED[]={22,23,24,25,26,27,28,29};
int anodaLED[]={37,36,35,34,33,32,31,30};
int jeda=20;

void setup() {
  // put your setup code here, to run once:
  for (int nmr=0;nmr<8;nmr++)
  {
    pinMode(katodaLED[nmr], OUTPUT);
    pinMode(anodaLED[nmr], OUTPUT);
  }
}

void loop() {
  // put your main code here, to run repeatedly:
  PORTA=B11111110;
  PORTC=B10000000;
  delay(jeda);
  
 
}