int LEDS[] = {23, 32, 33, 25, 26, 27, 14, 12};
byte anillo=0x7F;

void setup(){
  Serial.begin(115200);
  unsigned char i;
  for(i=0; i<=7; i++){
    pinMode(LEDS[i], OUTPUT);
  }
}

void dat(byte num ) {
  int i, j, m;
  m= 7;

  for(i=0; i<=7; i++)
  {
    j= pow(2, m);
    digitalWrite(LEDS[i], (num & j));
    m--;
  }
}

void loop() {
  Serial.println(anillo);
  dat(anillo);
  if(anillo==0xFE){ //1111 1110 , 254
    anillo= 0x7F; // 0111 1111 , 127
    delay(700);
  }
  else{
    anillo = anillo >>1 | 0x80; //1000 0000 , 128
    delay(700);
    }
    delay(700);
  }