#include<Servo.h>
const
int ServoOnePin=3;
Servo servoOne;int lightSensor = 0;
void setup() {
 pinMode(2, OUTPUT);
 Serial.begin(9600);
 pinMode(ServoOnePin, OUTPUT);
servoOne.attach(ServoOnePin);
}
void loop() {
 lightSensor = analogRead(A0);
 Serial.println(lightSensor);
 delay(500);
 if (lightSensor < 20) {
servoOne.write(0);
delay(500);
servoOne.write(90);
delay(500);
digitalWrite(2,1);

 }
 else {digitalWrite(2, LOW);

 }
}