void setup() {
  // put your setup code here, to run once:
pinMode(2, OUTPUT);
pinMode(3, OUTPUT);
pinMode(4, OUTPUT);
Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
int potensio;
potensio = analogRead(A0);
Serial.println(potensio);

digitalWrite(2, HIGH);
digitalWrite(3, LOW);
digitalWrite(4, LOW);
delay(potensio);
digitalWrite(2, LOW);
digitalWrite(3, HIGH);
digitalWrite(4, LOW);
delay(potensio);
digitalWrite(2, LOW);
digitalWrite(3, LOW);
digitalWrite(4, HIGH);
delay(potensio);
}