#include <Servo.h>

Servo myServo;  // create servo object

void setup() {
  myServo.attach(9); // attach servo to pin 9
}

void loop() {
  // Move to 0°, 90°, 180° with 1-second delay
  myServo.write(0);
  delay(1000);

  myServo.write(90);
  delay(1000);

  myServo.write(180);
  delay(1000);

  // Smooth sweep from 0° to 180° and back
  for (int pos = 0; pos <= 180; pos++) {
    myServo.write(pos);
    delay(15); // adjust speed of sweep
  }

  for (int pos = 180; pos >= 0; pos--) {
    myServo.write(pos);
    delay(15); // adjust speed of sweep
  }
}