#include <Servo.h>

Servo myServo;

int servoPin = D0;
int buttonPin = D3;
int ledPin = D2;

bool state = false;          // general state
bool lastButtonState = HIGH;

void setup() {
  myServo.attach(servoPin);
  pinMode(buttonPin, INPUT_PULLUP);
  pinMode(ledPin, OUTPUT);
}

void loop() {
  bool reading = digitalRead(buttonPin);

  // Detect button press (falling edge)
  if (lastButtonState == HIGH && reading == LOW) {
    state = !state; // toggle state

    if (state) {
      myServo.write(180);
      digitalWrite(ledPin, HIGH);
    } else {
      myServo.write(0);
      digitalWrite(ledPin, LOW);
    }

    delay(200); // simple debounce
  }

  lastButtonState = reading;
}