int latchPin=12;
int clockPin=13;
int dataPin=11;

byte LEDs=0b00000001; 

int pauza=500;

void setup() {
  pinMode(latchPin, OUTPUT);
  pinMode(clockPin, OUTPUT);
  pinMode(dataPin, OUTPUT);
}

void loop() {
  digitalWrite(latchPin, LOW);
  shiftOut(dataPin,clockPin,LSBFIRST,LEDs); 
  digitalWrite(latchPin, HIGH);
  delay(pauza);

  LEDs=LEDs/128+LEDs*2; // circle left
  //LEDs=LEDs*128+LEDs/2; // circle right
}