void setup() {
  Serial.begin(115200);
  pinMode(14, OUTPUT);
  pinMode(16, OUTPUT);
  pinMode(26, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(12, OUTPUT);
  pinMode(18, OUTPUT);
}

void loop() {

digitalWrite(14, HIGH);
digitalWrite(16, HIGH);
delay(3000);
digitalWrite(14, LOW);
digitalWrite(16, LOW);
digitalWrite(26, HIGH);
digitalWrite(5, HIGH);
delay(3000);
digitalWrite(26, LOW);
digitalWrite(5, LOW);
digitalWrite(12, HIGH);
digitalWrite(18, HIGH);
delay(3000);
digitalWrite(12, LOW);
digitalWrite(18, LOW);
digitalWrite(26, HIGH);
digitalWrite(5, HIGH);
delay(3000);
digitalWrite(26, LOW);
digitalWrite(5, LOW);
}