byte potensio = A0;
int nilai_pot, nilai_pwm;
byte led = 3;
void setup() {
  // put your setup code here, to run once:
Serial.begin(9600); 
pinMode(led, OUTPUT);
}
void loop() {
  // put your main code here, to run repeatedly:
nilai_pot = analogRead(potensio);
nilai_pwm = map(nilai_pot, 0, 1023, 0, 255); 
Serial.println(String() + nilai_pot + " " + nilai_pwm);  
analogWrite(led, nilai_pwm);
}