#include <Servo.h>

Servo myservo;  // create servo object to control a servo

// twelve servo objects can be created on most boards


int pos = 0;    // variable to store the servo position


void setup() {
  Serial.begin(9600);
  myservo.attach(9);  // attaches the servo on pin 9 to the servo object
}


void loop() {
  if(Serial.available()){
    num = Serial.parseInt();
    if (num == 0){
      servo.write(20);
    } else if (num == 1){
      servo.write(60);
    } else if (num == 2){
      servo.write(140)
    }
  }

  // for (pos = 0; pos <= 180; pos += 1) { // goes from 0 degrees to 180 degrees

  //   // in steps of 1 degree

  //   myservo.write(pos);              // tell servo to go to position in variable 'pos'
  //   Serial.println(pos);
  //   delay(15);                       // waits 15ms for the servo to reach the position

  // }

  // for (pos = 180; pos >= 0; pos -= 1) { // goes from 180 degrees to 0 degrees

  //   myservo.write(pos);              // tell servo to go to position in variable 'pos'
  //   Serial.println(pos);

  //   delay(15);                       // waits 15ms for the servo to reach the position

  // }
}