#include <Servo.h>

Servo myServo;
float pos = 0;
float step = 1;

#define HORZ_PIN A1

void setup() {
  myServo.attach(3);
  myServo.write(pos);
  Serial.begin(9600);
}

void loop() {
  int horz = analogRead(HORZ_PIN); 
  
  // Check if joystick is moved right (increase position) or left (decrease position)
  if (horz < 460) {   
    if (pos > 0) {
      pos -= step;
      myServo.write(pos);     
      delay(15);
    }
  }
  else if (horz > 560) {  
    if (pos < 180) {
      pos += step;
      myServo.write(pos);
      delay(15);
    }
  }

}