void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(27, OUTPUT);
  pinMode(26, OUTPUT);
  pinMode(25, OUTPUT);
  pinMode(18, OUTPUT);
  pinMode(17, OUTPUT);
  pinMode(16, OUTPUT);
  Serial.println("LED");
}

void loop() {
  digitalWrite(25,HIGH);
  Serial.println("ON");
  digitalWrite(18, HIGH);
  Serial.println("ON");
  delay(2000);
  digitalWrite(25, LOW);
  Serial.println("OFF");
  digitalWrite(18, LOW);
  Serial.println("OFF");
  digitalWrite(26, HIGH);
  Serial.println("ON");
  digitalWrite(17, HIGH);
  Serial.println("ON");
  delay(2000);
  digitalWrite(26, LOW);
  Serial.println("OFF");
  digitalWrite(17, LOW);
  Serial.println("OFF");
  digitalWrite(27, HIGH);
  Serial.println("ON");
  digitalWrite(16, HIGH);
  Serial.println("ON");
  delay(2000);
  digitalWrite(27, LOW);
  Serial.println("OFF");
  digitalWrite(16, LOW);
  Serial.println("OFF");
  digitalWrite(26, HIGH);
  Serial.println("ON");
  digitalWrite(17, HIGH);
  Serial.println("ON");
  delay(2000);
  digitalWrite(26, LOW);
  Serial.println("OFF");
  digitalWrite(17, LOW);
  Serial.println("OFF");
  // put your main code here, to run repeatedly:
  delay(10); // this speeds up the simulation
}