#include <TinyDebug.h>

//1
const int dataPin = PB0;   /* DS */
const int clockPin = PB1;  /* SHCP */
const int latchPin = PB2;  /* STCP */
//2
const int dataPin = PB5;   /* DS */
const int clockPin = PB1;  /* SHCP */
const int latchPin = PB2;  /* STCP */

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

int pattern = 1;
void loop() {
  digitalWrite(latchPin, LOW);
  shiftOut(dataPin, clockPin, LSBFIRST, pattern);
  digitalWrite(latchPin, HIGH);
  delay(500);
  if(pattern <= 128) {
    pattern = pattern*2; // Invert the pattern
  } else {
    pattern = 1;
  }
}