int count = 0; // Counter variable shared by both inputs
int SW1 = 8; // Set SW1 to Pin 8 for count up
int SW2 = 9; // Set SW2 to Pin 9 for count down
int prevSW1State = HIGH; // Previous state of SW1
int prevSW2State = HIGH; // Previous state of SW2

void setup() {
  DDRD = DDRD | B00011100; // set direction bits for pins 2 to 4, leave 0 and 1 untouched
  Serial.begin(9600);
  pinMode(SW1, INPUT);
  digitalWrite(SW1, HIGH); //enable pullup. Switch connected to ground
  pinMode(SW2, INPUT);
  digitalWrite(SW2, HIGH); //enable pullup. Switch connected to ground
}

void loop() {
  int currentSW1State = digitalRead(SW1);
  int currentSW2State = digitalRead(SW2);

  // Check if SW1 is pressed (count up)
  if (currentSW1State == LOW && prevSW1State == HIGH) {
    count++;
    if (count > 7) {
      count = 0;
    }
  }

  // Check if SW2 is pressed (count down)
  if (currentSW2State == LOW && prevSW2State == HIGH) {
    count--;
    if (count < 0) {
      count = 7;
    }
  }

  // 3 bits manipulated 0 to 7
  PORTD = PORTD & B11100011; // clear out bits 2 - 4, leave pins 0 and 1 untouched (xx & 11 = xx)
  int i = (count << 2); // shift variable up to pins 2 - 7 - to avoid pins 0 and 1
  PORTD = PORTD | i; // combine the port information with the new information for LED pins

  Serial.print("Count=");
  Serial.println(count);
  Serial.print("PORTD in Binary=");
  Serial.println(PORTD, BIN); // debug to show masking

  prevSW1State = currentSW1State;
  prevSW2State = currentSW2State;

  delay(100); // Adjust delay as needed to pick up on input interaction 
}