#include <Servo.h>
Servo myservo;
void setup(){
  myservo.attach(3);
}
void loop(){
  myservo.write(0);
  delay(2000);
  myservo.write(30);
  delay(2000);
  myservo.write(60);
  delay(2000);
  myservo.write(90);
  delay(2000);
  myservo.write(120);
  delay(2000);
  myservo.write(150);
  delay(2000);
  myservo.write(180);
  delay(2000);
  myservo.write(150);
  delay(2000);
  myservo.write(120);
  delay(2000);
  myservo.write(90);
  delay(2000);
  myservo.write(60);
  delay(2000);
  myservo.write(30);
  delay(2000);
  myservo.write(0);
  delay(2000);
}