XDML-FUNX

void setup() {
  for (int i = 0; i < 14; i++) {
    pinMode(i,OUTPUT);
    digitalWrite(i, LOW) ;
  }
}

void loop() {
  for (int i=0; i < 16; i++) {
    digitalWrite(10,i&1);
    digitalWrite(11,i&2);
    digitalWrite(12,i&4);
    digitalWrite(13,i&8);
    delay(1) ;
  }
}