// second program by Explosive Dynamic Lab
// random led blink
void setup(){
  pinMode(12,OUTPUT);
}

void loop(){

  int number = random(15);

  for(int a = 0; a < number; a++)
  {
    digitalWrite(12,HIGH);
    delay(50);
    digitalWrite(12,LOW);
    delay(50); 
  }
  delay(1000);
}