const int switch1Pin = 5;  // Pin for switch 1
const int switch2Pin = 6;  // Pin for switch 2
const int ledPins[] = {1, 2, 3, 4};  // Pins for the four LEDs

int counter = 0;  // Initialize counter
bool ledStates[] = {false, false, false, false};  // Initialize LED states

void setup() {
  // Initialize LED pins as outputs
  for (int i = 0; i < 4; i++) {
    pinMode(ledPins[i], OUTPUT);
  }
  
  // Initialize switch pins as inputs
  pinMode(switch1Pin, INPUT);
  pinMode(switch2Pin, INPUT);
 // Serial.begin(9600);
}

void loop() {
//Serial.println(counter);
  // Read the state of the switches
  int switch1State = digitalRead(switch1Pin);
  int switch2State = digitalRead(switch2Pin);
  
  // If switch 1 is pressed, increase the counter and display it on LEDs
  if (switch1State == LOW) {
    counter++;
    if (counter > 15) {
      counter = 0;
    }
    DisplayCounterOnLEDs(counter);
    delay(300);
  }
  
  // If switch 2 is pressed, decrease the counter and display it on LEDs
  if (switch2State == LOW) {
    counter--;
    if (counter < 0) {
      counter = 15;
    }
    DisplayCounterOnLEDs(counter);
    delay(300);
  }
}

void DisplayCounterOnLEDs(int count) {
  for (int i = 0; i < 4; i++) {
    // Set LED state based on binary representation of count
    bool state = bitRead(count, i);
    digitalWrite(ledPins[i], state);
    
  }
  
}