CODE:-

#include <Servo.h>
int ldrval;
int ldrpin=A0;
int servopin=9;
int servopress=90                   ;
int servoopen=36;
Servo myservo;
void setup() {
  // put your setup code here, to run once:
pinMode(ldrpin,INPUT);
myservo.attach(servopin);
Serial.begin(9600);
}

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

if (ldrval<=300) {
  myservo.write(servopress);
  Serial.println("press");
  delay(100);
}
myservo.write(servoopen);
Serial.println("open"); 
delay(1);
}