const int VRX = A1;
const int VRY = A2;

void setup() {
  Serial.begin(115200);
}

void loop() {
  if (millis() - lastTime > interval) {
    lastTime = millis();
    int joyX = map(analogRead(VRX), 0, 1023, -10, 10); 
    // int joyY = map(analogRead(VRY), 0, 1023, -10, 10); 
    brightness += joyX;
    brightness = constrain(brightness, 0, 255);
    analogWrite(LED_PIN, brightness);
  }
}