#define pot A0
#define led A1
int temp = 0;
void setup() {
  pinMode(led, OUTPUT);
  pinMode(pot, INPUT);
  Serial.begin(9600);
}

void loop() {
  int potvalue = analogRead(pot);
  int value = map(potvalue, 0,1023,0,255);
  if(value != temp){
    Serial.println(value);
    analogWrite(led, value);
    temp = value;
  }
}