/*
  Blink
  Turns on an LED on for one second, then off for one second, repeatedly.
 
  This example code is in the public domain.
 */
 
// Pin 13 has an LED connected on most Arduino boards.
// give it a name:
int led = 7;

// the setup routine runs once when you press reset:
void setup() {                
  // initialize the digital pin as an output.
  Serial.begin(9600);
  pinMode(led, OUTPUT);     
}

// the loop routine runs over and over again forever:
void loop() {
  Serial.println(analogRead(A0));
  if (analogRead(A0)>500)
  {
    digitalWrite(led, LOW);   // turn the LED on (HIGH is the voltage level)
  }
  else digitalWrite(led, HIGH);
}