int analogValue;          // This is where we'll store our audio to digital value.  More sound = higher number
int LED_Pin = 13;             // Set up the LED indicator
int Sound_Pin = A0;
boolean toggle = false;   // setup a boolean function called toggle which will help us to choose which mode we're in
int t =548 ;
void setup()
{
  pinMode(LED_Pin,OUTPUT);    // Pin#5 should be conencted to an LED through a 300-600 ohm resistor
  Serial.begin(9600);     // This is optional - It just helps you to calibrate sensitivity after the fact
}

void loop()
{
  /*analogValue = analogRead(Sound_Pin);
  Serial.println(analogValue);
  delay(50);*/

  if (toggle == false)   // When you power up your arduino, boolean "toggle" is set to false, so the following section of code will commence.  The "ELSE" is ignored for now.
    {
      digitalWrite(LED_Pin,LOW);        // Turn the LED off
      analogValue = analogRead(Sound_Pin);  // Take an analog reading from A0 line.  No sounds should be offer a returned value of "0"

      if (analogValue >t)          // If higher than 8 is returned, then change state of boolean "toggle" to true, display analogValue to serial monitor and wait 200ms.
      // The higher the value in the above "if" statement, the less sensitive your clapper will be.  Use the serial monitor to calibrate to your wanted sensitivity =D
      {
        toggle = true;
        Serial.println(analogValue);
        delay(200);
      }
    }
    else                            // If boolean "toggle" has beenchanged to true, then the above section of code will be ignored, and the code below will commence.
    {
      digitalWrite(LED_Pin,HIGH);       // Turn the LED on
      analogValue = analogRead(0);  // Take an analog reading from A0 line.  No sounds should be offer a returned value of "0"

      if (analogValue > t)          // If higher than 8 is returned, then change state of boolean "toggle" back to false, print analogValue to serial monitor and wait 200ms.
      // The higher the value in the above "if" statement, the less sensitive your clapper will be.  Use the serial monitor to calibrate to your wanted sensitivity =D
      {
        toggle = false;
        Serial.println(analogValue);
        delay(200);
      }
    }

}