/*
  Whacky Fade

  Utilizo este código para simular un mal funcionamiento de un viejo letrero luminoso.
  El efecto aleatorio imita un mal funcionamiento debido a corto circuitos.

  I use this code to simulate a malfunction of an old illuminated sign.
  The random effect mimics a malfunction due to short circuits.
*/

int led = 9;         // the PWM pin the LED is attached to
int brightness = 0;  // how bright the LED is
int fadeAmount = 5;  // how many points to fade the LED by
long randomNumber;

void setup() {
  // declare pin 9 to be an output:
  pinMode(led, OUTPUT);
}


void loop() {
  // set the brightness of pin 9:
  analogWrite(led, brightness);

  // change the brightness for next time through the loop on random amounts:
  randomNumber = random(1,50);
  brightness = brightness + fadeAmount*randomNumber;

  // reverse the direction of the fading at the ends of the fade:
  if (brightness <= 0 || brightness >= 255) {
    fadeAmount = -fadeAmount;
  }
  // wait random time to continue with the dimming effect
  delay(random(20,80));
  

  // This routine blinks randoms on/offs, Only enter once in 200 times.
  if (random(1,200) == 1 ){      
    for (int i=0; i <= random(2,6); i++){ 
      analogWrite(led, brightness);
      delay(random(10,200));
      analogWrite(led, 0);
      delay(random(30,700));
    }
  }
}