int potpin = 0;
int val;    
int pin=5;
void setup() {
    pinMode(pin, OUTPUT);
    Serial.begin(9600);
}

void loop() {
  val = analogRead(potpin);             
  val = map(val, 0, 1023, 0, 5); 
  Serial.println(val);
  digitalWrite(pin,val);                 
  delay(15);                           
}