int LED = 13;
  int sensorPin = A2;

void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);
pinMode(LED, OUTPUT);

}

void loop() {
  // put your main code here, to run repeatedly:
  int val = analogRead(sensorPin);
  Serial.println(val);

  digitalWrite(LED, HIGH);
  delay(val/4);
  digitalWrite(LED, LOW);
  delay(val/4);


}