int pot=A0;
int led=9;
int val;
void setup()
{
  Serial.begin(115200);
  pinMode(pot, INPUT);
  pinMode(led, OUTPUT);
}

void loop(){
  val=analogRead(pot);
  Serial.println(val);
  delay(1000);
  val=(255./1023.)*val;
   analogWrite(led,val);
}