void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(18, INPUT);
  pinMode(5, OUTPUT);
  pinMode(16, OUTPUT);
  pinMode(4, OUTPUT);

}

void loop()
 {
 switchstate = digitalRead(18);
 if(switchstate==1);
 {
  digitalWrite(5, HIGH);
  digitalWrite(16, HIGH);
  digitalWrite(4, HIGH);
 }
 else
 digitalWrite(5, LOW);
 digitalWrite(16, LOW);
 digitalWrite(4, LOW);
  // put your main code here, to run repeatedly:
  delay(10); // this speeds up the simulation
}