const int MUX_S0 = 0;   // Multiplexer control pin S0
const int MUX_S1 = 1;   // Multiplexer control pin S1
const int MUX_S2 = 2;   // Multiplexer control pin S2
const int MUX_S3 = 3;   // Multiplexer control pin S3

const int NUM_MUX_CHANNELS = 16; // Number of channels per multiplexer
const int NUM_MULTIPLEXERS = 2;   // Number of multiplexers

const int LED_PIN_1 = 4; // First LED pin
const int LED_PIN_2 = 5; // Second LED pin

void setup() {
  pinMode(MUX_S0, OUTPUT);
  pinMode(MUX_S1, OUTPUT);
  pinMode(MUX_S2, OUTPUT);
  pinMode(MUX_S3, OUTPUT);
  
  pinMode(LED_PIN_1, OUTPUT);
  pinMode(LED_PIN_2, OUTPUT);
  
  Serial.begin(9600);
}

void loop() {
  for (int mux = 0; mux < NUM_MULTIPLEXERS; mux++) {
    for (int channel = 0; channel < NUM_MUX_CHANNELS; channel++) {
      // Set the multiplexer control pins
      setMuxControlPins(mux, channel);

      // Turn on the LEDs
      digitalWrite(LED_PIN_1, HIGH);
      digitalWrite(LED_PIN_2, HIGH);

      // Wait for a second
      delay(1000);

      // Turn off the LEDs
      digitalWrite(LED_PIN_1, LOW);
      digitalWrite(LED_PIN_2, LOW);
      
      // Delay before the next channel
      delay(100); // Delay for better readability, adjust as needed
    }
  }
}

void setMuxControlPins(int mux, int channel) {
  digitalWrite(MUX_S0, bitRead(channel, 0));
  digitalWrite(MUX_S1, bitRead(channel, 1));
  digitalWrite(MUX_S2, bitRead(channel, 2));
  digitalWrite(MUX_S3, bitRead(channel, 3));
}