void setup()
 {
  Serial.begin(115200);
  pinMode(25,OUTPUT);
  pinMode(5,OUTPUT);
  pinMode(26,OUTPUT);
  pinMode(18,OUTPUT);
  pinMode(27,OUTPUT);
  pinMode(19,OUTPUT);
 }

void loop()
 {
  digitalWrite(26,HIGH);
  digitalWrite(5,HIGH);
  digitalWrite(25,LOW);
  digitalWrite(27,LOW);
  digitalWrite(19,LOW);
  digitalWrite(18,LOW); 
 
  delay(2000);
  digitalWrite(26,LOW);
  digitalWrite(5,LOW);
  digitalWrite(25,HIGH);
  digitalWrite(27,HIGH);
  digitalWrite(19,LOW);
  digitalWrite(18,LOW); 
  
    delay(2000);
  digitalWrite(26,LOW);
  digitalWrite(5,LOW);
  digitalWrite(25,LOW);
  digitalWrite(27,LOW);
  digitalWrite(19,HIGH);
  digitalWrite(18,HIGH); 
  }