char chars[11] = {'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K'};
int pins[13] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13};

void setup() {
  Serial.begin(9600);
  Serial.println(chars);
  Serial.println("Hello");

}

void loop() {
  digitalWrite(pins, HIGH);
  delay(500);
  digitalWrite(pins, LOW);
  delay(500);
}