void setup() {
  Serial.begin(115200);
  pinMode(13, OUTPUT);
  pinMode(12, OUTPUT);
  pinMode(14, OUTPUT);
  pinMode(18, OUTPUT);
  pinMode(16, OUTPUT);
  pinMode(15, OUTPUT);
}

void loop() {
 digitalWrite(14, HIGH); 
 digitalWrite(15, HIGH);
 delay(1000);
 digitalWrite(14, LOW);
 digitalWrite(15, LOW);
 delay(1000);
 digitalWrite(12, HIGH);
 digitalWrite(16, HIGH);
 delay(1000);
 digitalWrite(12, LOW);
 digitalWrite(16, LOW);
 delay(1000);
 digitalWrite(13, HIGH);
 digitalWrite(18, HIGH);
 delay(1000);
 digitalWrite(13, LOW);
 digitalWrite(18, LOW);
}