const int sensorPin = A0;

void setup() {

  pinMode(LED_BUILTIN, OUTPUT);


  // put your setup code here, to run once:

}

void loop() {

  int delayval = analogRead(sensorPin); // read the analog input
 digitalWrite(LED_BUILTIN, HIGH); // set the LED on
 delay(delayval); // delay is dependent on light level
 digitalWrite(LED_BUILTIN, LOW); // set the LED off
 delay(delayval);

  
  // put your main code here, to run repeatedly:

}