int led = 3;
int pot = A0;

void setup() {
  // put your setup code here, to run once:
pinMode(led, OUTPUT);
Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
  int value = analogRead(pot);
  int bright = map(value,0, 1023 ,0 , 255);
  analogWrite(led,bright);
  Serial.println(bright);


}