void setup() {
  DDRD = 0xFF;

}

void loop() {
  PORTD = 0x3F;
  delay(1000);

  PORTD = 0x06; //hexadecimal
  delay(1000);

  PORTD = 0b01011011; //binario, 1 nos leds que devem acender
  delay(1000);

  PORTD = 0b01001111;
  delay(1000);

  PORTD = 0b01100110;
  delay(1000);

  PORTD = 0b01101101;
  delay(1000);

  PORTD = 0b01111101;
  delay(1000);

  PORTD = 0b00000111;
  delay(1000);

  PORTD = 0b01111111;
  delay(1000);

  PORTD = 0b01100111;
  delay(1000);

  PORTD = 0b01110111;
  delay(1000);

  PORTD = 0b01111100;
  delay(1000);

  PORTD = 0b00111001;
  delay(1000);

  PORTD = 0b01011110;
  delay(1000);

  PORTD = 0b01111001;
  delay(1000);

  PORTD = 0b01110001;
  delay(1000);
}