int sensorPin = A0;
int ledPin = 9;
int sensorValue = 0;

void setup() {
  pinMode(ledPin, OUTPUT);
  // put your setup code here, to run once:

}

void loop() {
  sensorValue = analogRead(sensorPin);
  digitalWrite(ledPin, HIGH);
  delay(sensorValue);
  digitalWrite(ledPin, LOW);
  delay(sensorValue);
  // put your main code here, to run repeatedly:

}