// ************ UNO_Mux0323 *****************


const int muxSIG =A0;
const int muxS0 =2;
const int muxS1 =3;
const int muxS2 =4;
const int muxS3 =5;

//int x 
int SetMuxChannel (byte channel) 
    
{
 
 digitalWrite(muxS0, bitRead(channel, 0));
 digitalWrite(muxS1, bitRead(channel, 1));
 digitalWrite(muxS2, bitRead(channel, 2)); 
 digitalWrite(muxS3, bitRead(channel, 3));
}

void setup() 
{
    pinMode(muxSIG, OUTPUT);
    pinMode(muxS0, OUTPUT);
    pinMode(muxS1, OUTPUT);
    pinMode(muxS2, OUTPUT);
    pinMode(muxS3, OUTPUT);

  Serial.begin(9600);
  delay(1000);
}

void loop()
{

    for (int x = 0; x < 16; x++)  
 {
      //int x = 9; 
      SetMuxChannel (x); 
   /* digitalWrite(muxS0,  1);
      digitalWrite(muxS1, 0);
      digitalWrite(muxS2, 1);
      digitalWrite(muxS3, 0);*/

    //digitalWrite(muxSIG, HIGH); delay(1000); 
    //digitalWrite(muxSIG, LOW);
    //Serial.println(" low ");
    //delay(500);
    Serial.println(x);
    digitalWrite(muxSIG, HIGH);
    Serial.println("HIGH");
    delay(500);
    //digitalWrite(muxSIG, HIGH);
    digitalWrite(muxSIG, LOW );
    Serial.println("low ");
    delay(500);


    //Serial.println(val x);

    int lux = analogRead(muxSIG);   // read the value from the sensor  
    Serial.println(lux);   //The serial will print the light value

  }

}