int Nawa_light = 12;
int Naiwa_light = 4;

void setup() {
  pinMode(Nawa_light,OUTPUT);
  pinMode(Naiwa_light, OUTPUT);
}

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