// Intan Nuraeni
// 21060010


#include <Servo.h>

const int BUTTON_PIN = 7;
const int SERVO_PIN  = 9;

Servo servo;

int angle = 0;
int lastButtonState;
int currentButtonState;

void setup() {
  Serial.begin(9600);
  pinMode(BUTTON_PIN, INPUT_PULLUP);
  servo.attach(SERVO_PIN);

  servo.write(angle);
  currentButtonState = digitalRead(BUTTON_PIN);
}

void loop() {
  lastButtonState    = currentButtonState;
  currentButtonState = digitalRead(BUTTON_PIN);

  if(lastButtonState == HIGH && currentButtonState == LOW) {
    Serial.println("The button is pressed");

    if(angle == 0)
      angle = 90;
    else
    if(angle == 90)
      angle = 0;

    servo.write(angle);
    delay (1000);
  }
}