int ledPin=13;
int readValue=0;
int ledValue=0; // Define the LED pin (e.g., pin 9)

void setup() 
{
  pinMode(ledPin, OUTPUT);
  Serial.begin(9600);
}

void loop() 
{
  readValue=analogRead(A0);
  ledValue=map(readValue,0,1024,0,255);
  Serial.println(readValue);
  analogWrite(ledPin, ledValue);
  delay(100);
}