const int dataPin = 28;   /* DS */
const int clockPin = 26;  /* SHCP */
const int latchPin = 27;  /* STCP */

void setup() {
  // put your setup code here, to run once:
  pinMode(dataPin, OUTPUT);
  pinMode(clockPin, OUTPUT);
  pinMode(latchPin, OUTPUT);
  Serial1.begin(115200);
  Serial1.println("Hello, Raspberry Pi Pico W!");
}


int pattern = 0b10101010;
void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(latchPin, LOW);
  shiftOut(dataPin, clockPin, LSBFIRST, pattern);
  digitalWrite(latchPin, HIGH);
  delay(500);
  pattern = ~pattern; // Invert the pattern
}