void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
pinMode(26, OUTPUT);
pinMode(16, OUTPUT);
pinMode(13, OUTPUT);
pinMode(21, OUTPUT);
pinMode(2, OUTPUT);
pinMode(15, OUTPUT);
pinMode(4, INPUT);


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

void loop() {

  int a = digitalRead(4);

  if( a== HIGH);
   

   




digitalWrite(26, HIGH);
digitalWrite(15, HIGH);
delay(1000);

digitalWrite(26, LOW);
digitalWrite(15, LOW);

delay(1000);

digitalWrite(16, HIGH);
digitalWrite(2, HIGH);
delay(1000);

digitalWrite(16, LOW);
digitalWrite(2, LOW);
delay(1000);


digitalWrite(13, HIGH);
digitalWrite(21, HIGH);
delay(1000);



digitalWrite(13, LOW);
digitalWrite(21, LOW);
delay(1000);

  
  
}

else

{
  

  digitalWrite(26, LOW);
  digitalWrite(16, LOW);
  digitalWrite(13, LOW);
  digitalWrite(21, LOW);
  digitalWrite(2,  LOW);
  digitalWrite(15, LOW);
}