// Parameterizing pin numbers for better readability and maintainability
int buzzer = D0;  // Assigning D0 to the variable 'buzzer'
int button = D1;  // Assigning D1 to the variable 'button'

void setup() {
  pinMode(buzzer, OUTPUT);  // sets pin assigned to 'buzzer' as an output
  pinMode(button, INPUT);   // sets pin assigned to 'button' as an input
}

void loop() {
  // Read the state of the button
  if (digitalRead(button) == HIGH) {
    // If the button is pressed, turn on the buzzer
    digitalWrite(buzzer, HIGH); // sets pin assigned to 'buzzer' HIGH
  } else {
    // If the button is not pressed, turn off the buzzer
    digitalWrite(buzzer, LOW);  // sets pin assigned to 'buzzer' LOW
  }
}