const int led=2;

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:

  int analogico=analogRead(5);
  Serial.println(analogico); 
  if(analogico>500)

  {

   digitalWrite (led,LOW);
   
    }
else
{
   digitalWrite (led,HIGH);
  }
}