#define LED 2
#define Analogpin(A0)
void setup() {
  pinMode(LED, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  float val= analogRead(A0);
  float brightness= map(val,0,1023,0,255);
  analogWrite(LED,brightness);
  Serial.print("pot value");
  Serial.println(brightness);
  delay(1000);
}