void setup() {
  // put your setup code here, to run once:
pinMode(11, OUTPUT);
pinMode(12, OUTPUT); 
}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(11, HIGH);
digitalWrite(11, LOW);
delay(1000); // Wait for 1000 millisecond(s)

digitalWrite(12, HIGH);
digitalWrite(12, LOW);
delay(1000); // Wait for 1000 millisecond(s)
}