const int ledPin = 9;
void setup() {
 Serial.begin(9600);
pinMode(ledPin, OUTPUT);
}
void loop() {
  int  analogPin;
 int val = analogRead(analogPin); 
 analogWrite(ledPin, val / 4); 
 Serial.print("Analog Value : ");
 Serial.print(val);
 Serial.println();
 delay(1000);
}