// Aluno : Victor Filgueiras Santana - Trabalho Semáfaro//
int var = 0;
void function()
{
  var = !var;
}
void setup()
{
  DDRD = 0xE0;
  DDRB = 0x3E;
attachInterrupt(digitalPinToInterrupt(2),function,RISING);
}

void loop()
{
  if(var==0)
  {
    PORTD = 0x20;
    PORTB = 0x24;
    delay(3000);
    PORTD = 0x40;
    PORTB = 0x24;
    delay(1000);
    PORTB = 0x0C;
    PORTD = 0x80;
    delay(3000);
    PORTB = 0x14;
    PORTD = 0x80;
    delay(1000);
  }
else
  {
    PORTD = 0x80;
    PORTB = 0x22;
    delay(4000);
    function();
  } 
}