const int MEAN_N = 10;
int sensorSTORAGE_01[MEAN_N];
int sensorSTORAGE_02[MEAN_N];


int ledPins[]     = {6,9};
int sensorPins[]  = {2,3};

const int N_LEDS = 2;        // How many LEDS
const int N_SENSORS = 2;     // How many SENSORS

int minDistance = 300;
int maxDistance = 800;


int sensorReadings[N_SENSORS];
unsigned long sensorTotals[N_SENSORS];
unsigned int sensorAvg[N_SENSORS];
int indexs[N_SENSORS];


void setup()   {
   Serial.begin(9600);


// SETUP pinModes

  for(int i = 0; i < N_LEDS; i++)
  pinMode(ledPins[i], OUTPUT);

  for(int i = 0; i < N_SENSORS; i++)
  pinMode(sensorPins[i], INPUT);

  Serial.println(N_LEDS);
  Serial.println(N_SENSORS);
  Serial.println("SETUP COMPLETE");

}


void loop() {

  for(int i = 0; i < N_SENSORS; i++) {

      sensorReadings[i] = analogRead(sensorPins[i]);

      sensorReadings[i] = map(sensorReadings[i], minDistance, maxDistance, 255, 0);
      sensorReadings[i] = constrain(sensorReadings[i], 0, 255);

      addValueToStorage(sensorReadings[i], i);

      // Time for a little ILLUMINATION!!!

      analogWrite(ledPins[i], sensorAvg[i]);

  }


}

void addValueToStorage(int whatValue, int i) {

 // Adds the current reading to the right storage array

 int index = indexs[i];

  sensorTotals[i] = sensorTotals[i] - sensorSTORAGE_01[index];
  sensorSTORAGE_01[index] = whatValue;
  sensorTotals[i] = sensorTotals[i] + sensorSTORAGE_01[index];

  index ++;

  if (index >= MEAN_N)
  index = 0;

indexs[i] = index;

  sensorAvg[i] = sensorTotals[i] / MEAN_N;

}