#include <Servo.h>

Servo myServo;

void setup() {
  myServo.attach(9);
  randomSeed(analogRead(A0));
}

void loop() {

  // 1. Sweep from 0° to 180°
  for (int pos = 0; pos <= 180; pos++) {
    myServo.write(pos);
    delay(15);
  }

  // Sweep back
  for (int pos = 180; pos >= 0; pos--) {
    myServo.write(pos);
    delay(15);
  }

  delay(1000);

  // 2. Move to center
  myServo.write(90);
  delay(1000);

  // 3. Wave motion
  for (int i = 0; i < 3; i++) {
    myServo.write(60);
    delay(300);
    myServo.write(120);
    delay(300);
  }

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

  // 4. Random positions
  for (int i = 0; i < 5; i++) {
    int randomPos = random(0, 181);
    myServo.write(randomPos);
    delay(800);
  }

  // 5. Fast shake
  for (int i = 0; i < 10; i++) {
    myServo.write(80);
    delay(50);
    myServo.write(100);
    delay(50);
  }

  myServo.write(90);
  delay(2000);
}