int sensePin = 0;
int ledPin = 9;

void setup()
{
  pinMode(ledPin, OUTPUT);
  analogReference(DEFAULT); //not neccessary

  Serial.begin(9600);

}

void loop()
{

  int val = analogRead(sensePin);
  if (val >= 250)
  {
    digitalWrite(ledPin, HIGH);
  }
  else digitalWrite(ledPin, LOW);

  Serial.println(analogRead(sensePin));
  delay(500);

}