#include<Servo.h>
servo motor;

void setup() {
  motor.attacach(9);
  motor.write(0);

  // put your setup code here, to run once:

}

void loop() {
  motor.write(45);
  delay(500);
  motor.write(90);
  delay(500);
  motor.write(135);
  delay(500);
  motor.write(180);
  delay(500);
  motor.write(0);
  delay(500);
    // put your main code here, to run repeatedly:

}