void setup() {
  Serial.begin(115200);
  pinMode(25,OUTPUT);
  pinMode(26,OUTPUT);
  pinMode(27,OUTPUT);
  pinMode(23,OUTPUT);
  pinMode(17,OUTPUT);
  pinMode(16,OUTPUT);
}

void loop() {
  digitalWrite(25,HIGH);
  digitalWrite(16,HIGH);
  delay(3000);
  digitalWrite(25,LOW);
  digitalWrite(16,LOW);
  digitalWrite(26,HIGH);
  digitalWrite(17,HIGH);
  delay(3000);
  digitalWrite(26,LOW);
  digitalWrite(17,LOW);
  digitalWrite(27,HIGH);
  digitalWrite(23,HIGH);
  delay(3000);
  digitalWrite(27,LOW);
  digitalWrite(23,LOW);
   digitalWrite(26,HIGH);
  digitalWrite(17,HIGH);
  delay(3000);
  digitalWrite(26,LOW);
  digitalWrite(17,LOW);
  
}