Arduino Multi Servo Serial

// Arduino Kontrol 2 servo menggunakan serial terminal
// Perintah 1 to 4
// Power servo harus menggunakan power external jika menggunakan multi servo

#include <Servo.h>
Servo myservo;
Servo myservo2;

void setup()
{
  Serial.begin(9600);
  myservo.attach(9);
  myservo2.attach(10);
  myservo.write(100);
  myservo2.write(100);
  delay(1000);
}

void loop() {
  if (Serial.available())
  {
    int state = Serial.parseInt();
    if (state == 1)
    {
      bukaservo1();
    }
   if (state == 2)
    {
     bukaservo2();
    }
    if (state == 3)
    {
      tutupservo1();
    }
   if (state == 4)
    {
      tutupservo2();
    }
  }

}
// Akhir Void Loop


void bukaservo1(){
  myservo.write(100);
}
void bukaservo2(){
  myservo2.write(100);
}

void tutupservo1(){
  myservo.write(180);
}

void tutupservo2(){
  myservo2.write(180);
}