int ledPin = 2;      
int potensioPin = 34;   
int val = 0;      
  
void setup()
{
  Serial.begin(9600);
  pinMode(ledPin, OUTPUT);  
}

void loop(){
  val = analogRead(potensioPin); 
  int nilai = (val / 4) / 4;
  analogWrite(ledPin, nilai);
  Serial.println(nilai);
}