void setup() {
  DDRD = 0b11100000;

}

void loop() {
  PORTD = 0b00100000; //ligar led vermelho
  delay(1000);
  PORTD = 0b10000000; //ligar led verde
  delay(1000);
  PORTD = 0b01000000; //ligar led amarelo
  delay(1000);

  //_asm_("nop\n\t"); delay em assembly
}