//Update Shift Register to flush new bits into signal LEDs
void updateShiftRegister() {
  // Prepare the data to be shifted into the shift register
  byte data = 0b00000000; // Clear the bits

  for (int i=0; i < numButtons; i++){
    data |= buttonStates[i] << (7 - i);
  }

  //Handling signal LED blinks
  if (blueLED){
    data |= 0b1 << 0;
  }
  if (yellowLED){
     data |= 0b1 << 1;
  }
  if (redLED){
     data |= 0b1 << 2;
  }

  // Shift the data into the shift register
  for (int i = 7; i >= 0; --i) {
    digitalWrite(SER_PIN, (data >> i) & 0b1);
    digitalWrite(SRCLK_PIN, HIGH);
    delay(1); // Optional: Adjust delay if needed
    digitalWrite(SRCLK_PIN, LOW);
  }

  // Latch the data to the output pins of the shift register
  digitalWrite(RCLK_PIN, HIGH);
  delay(1); // Optional: Adjust delay if needed
  digitalWrite(RCLK_PIN, LOW);
}