void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(26,OUTPUT );
    pinMode(25,OUTPUT );
        pinMode(27,OUTPUT );

    
  Serial.println("Hello, ESP32!");
}

void loop() {
  int switchcase;
  switchcase=digitalRead(4);
  if(switchcase==1)
  {
  digitalWrite(26,HIGH);
  delay(1000);  

  digitalWrite(26,LOW);
  delay(1000); 
    digitalWrite(25,HIGH);
      delay(1000);
        digitalWrite(25,LOW);
          delay(1000); 
            digitalWrite(27,HIGH);      
             delay(1000); 
                     digitalWrite(27,LOW);
                     delay(1000); 
            
  // this speeds up the simulation
}
else {
digitalWrite(26, LOW);
 digitalWrite(25, LOW);
digitalWrite(27, LOW);
}
}