Waving hand project

#include <Servo.h>

Servo arm;

const int joystickPin = A0;

void setup() {
  arm.attach(9);
  arm.write(90); // Center position
}

void loop() {

  int joy = analogRead(joystickPin);

  // Push joystick right to wave
  if (joy > 700) {

    for (int i = 0; i < 3; i++) {
      arm.write(45);
      delay(300);

      arm.write(135);
      delay(300);
    }

    arm.write(90);
  }
}