// the pin we're reading from
int mic_pin = xxx;
// store the noise level / reading from the electret
// TODO: CREATE A INTEGER VARIABLE NAMED noise_level 
int xxxxxxx 
const int sampleWindow = 50;
// TODO: CREATE A INTEGER VARIABLE NAMED numPins and initialize it to 5 
int 
int ledPins[ 5 ] = { D0, D1, D2, D3, D4 };
void setup(){
  // start serial connection
  Serial.begin(9600);
  for( int i = 0 ; i < numPins; i++ ){
      
    // TODO: Set the pinmode to output
    pinMode(ledPins[ i ], XXXXX);
  }
}
void loop()
{
 
  noise_level = sampleNoise( );
  
  // TODO: Write the noise_level to serial
  // Hint: Serial.println
  displayNoiseOnLEDs();
  // TODO: Wait for 50 milliseconds before looping again
  XXXXXXX
}
void displayNoiseOnLEDs(){
  int level = 200;
  for( int i = 0 ; i < numPins; i++ ){
    int led = ledPins[ i ];
    int desiredLevel = 200 * (i+1);
    if( noise_level > desiredLevel ){
        // TODO: Write the led to HIGH
        
    }else{
        // TODO: Write the led to LOW
    }
  }
}
int sampleNoise( )
{
  unsigned long startMillis = millis(); // Start of sample window
  int highest_sample = 0;
  int lowest_sample = 1000;
  // collect data for 50 mS
  while (millis() - startMillis < sampleWindow)
  {
    int sample = analogRead( mic_pin );
    // invert the range, and convert it to a percent
    sample = map( sample, 0, 4095, 1000, 0 );
    // now see if the sample is the lowest;
    if ( sample > highest_sample ){
    highest_sample = sample ;
    }
    if ( sample < lowest_sample ){
    lowest_sample = sample;
    }
  }
  int peakToPeak = highest_sample - lowest_sample;
  return peakToPeak;
}