Arduino Servo Sweep

#include <Servo.h>

Servo myservo;

int pos = 0;

void setup()
{
  myservo.attach(9);
}

void loop() {
  for (pos = 0; pos <= 180; pos += 1)
  {
    myservo.write(pos);
    delay(15);
  }
  for (pos = 180; pos >= 0; pos -= 1)
  {
    myservo.write(pos);
    delay(15); 
  }
}