const int AnalogPin = A0;
const int ledPins = 3;

void setup() {
  pinMode(AnalogPin, INPUT);
  for (int i = 0; i < 1; i++) {
    pinMode(ledPins, OUTPUT);
  }
  Serial.begin(9600);
}

void loop() {
  int A = analogRead(AnalogPin);
  int pwm = map(A, 0, 1023, 0, 255);

  for (int i = 0; i < 1; i++) {
    analogWrite(ledPins, pwm);
  }
}