void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(19, OUTPUT);
  pinMode(18, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(13, INPUT);
}

void loop() {
  int a=digitalRead(13);
  if(a==1)
  {
    Serial.println(a);
    digitalWrite(19, HIGH);
    digitalWrite(18, HIGH);
    digitalWrite(5, HIGH);
}
   else(a==0);{
  Serial.println(a);
  digitalWrite(19,LOW);
  digitalWrite(18,LOW);
  digitalWrite(5, LOW);

}

}