#include <Servo.h>  // Include the Servo library

Servo myServo;  // Create a Servo object

void setup() {
  myServo.attach(9);  // Attach the servo signal wire to digital pin 9
}

void loop() {
  myServo.write(0);    // Rotate servo to 0 degrees
  delay(1000);         // Wait for 1 second
  
  myServo.write(90);   // Rotate servo to 90 degrees
  delay(1000);         // Wait for 1 second
  
  myServo.write(180);  // Rotate servo to 180 degrees
  delay(1000);         // Wait for 1 second
}