void setup(){
	pinMode(6, OUTPUT);
	pinMode(7, OUTPUT);
	pinMode(8, OUTPUT);
}

void loop() {
	flash_led(6,500);
	flash_led(7,1000);
	flash_led(8,200);
}

void flash_led(byte unled, unsigned long espera) {
      digitalWrite(unled, HIGH);
      delay(espera);
      digitalWrite(unled, LOW);
      delay(espera);
}






