#include <Servo.h>

Servo myservo;  // Create a servo object
int pos = 0;    // Initialize the servo position

void setup() {
  myservo.attach(9);  // Attaches the servo on pin 9
}

void loop() {
  // Move the servo from 0 to 160 degrees
  for (pos = 0; pos <= 160; pos += 2) {
    myservo.write(pos);   // Move servo to 'pos' degrees
    delay(15);            // Wait for 15 milliseconds
  }
delay(5000);
  // Move the servo from 160 to 0 degrees
  for (pos = 160; pos >= 0; pos -= 2) {
    myservo.write(pos);   // Move servo to 'pos' degrees
    delay(15);            // Wait for 15 milliseconds
  }
delay(5000);
}