const int sensorPin = A0;
const int ledPin =  27;
 
 
void setup() 
{
  // declare the ledPin as an OUTPUT:
  pinMode(sensorPin, INPUT);
  pinMode(ledPin, OUTPUT);
}
 
 
void loop()
{
  // read the value from the sensor:
  int sensorValue = analogRead(sensorPin);
  // turn the ledPin on
  digitalWrite(ledPin, HIGH);
  // stop the program for <sensorValue> milliseconds:
  delay(sensorValue);
  // turn the ledPin off:
  digitalWrite(ledPin, LOW);
  // stop the program for for <sensorValue> milliseconds:
  delay(sensorValue);
}