int pins[]={13,12,11,8,4,2};
int size=sizeof(pins)/sizeof(pins[0]);
void setup() {
  // put your setup code here, to run once:
    for(int i=0;i<size;i++){
      pinMode(pins[i],OUTPUT);
    }
}

void loop() {

  for(int i=0;i<64;i++){
digitalWrite(pins[0],i%2>0);
digitalWrite(pins[1],i%4>1);
digitalWrite(pins[2],i%8>3);
digitalWrite(pins[3],i%16>7);
digitalWrite(pins[4],i%32>15);
digitalWrite(pins[5],i%64>31);
delay(1000);
  }
}