#include <Servo.h>
Servo myservo;

void setup() {
  // put your setup code here, to run once:
  myservo.attach(9);
}

void loop() {
  // put your main code here, to run repeatedly:
  myservo.write(0);
  delay(500);

  myservo.write(50);
  delay(500);

  myservo.write(90);
  delay(500);

  myservo.write(130);
  delay(500);

  myservo.write(180);
  delay(500);
}