#define BUTTON_PIN 16 // ESP32 GPIO16 pin connected to button's pin
#define BUZZER_PIN 21 // ESP32 GPIO21 pin connected to Buzzer's pin
#define led1 22
#define led2 23 

void setup() {
  Serial.begin(9600);                // initialize serial
  pinMode(BUTTON_PIN, INPUT_PULLUP); // set ESP32 pin to input pull-up mode
  pinMode(BUZZER_PIN, OUTPUT);       // set ESP32 pin to output mode
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
}

void loop() {
  int buttonState = digitalRead(BUTTON_PIN); // read new state

  if (buttonState == LOW) {
    Serial.println("The button is being pressed");
    digitalWrite(BUZZER_PIN, HIGH); // turn on
    digitalWrite(led1, HIGH);
    digitalWrite(led2, HIGH);
  }
  else
  if (buttonState == HIGH) {
    Serial.println("The button is unpressed");
    digitalWrite(BUZZER_PIN, LOW);  // turn off
    digitalWrite(led1, LOW);
    digitalWrite(led2, LOW);
  }
}