#include<Servo.h>
// include the ldr sensor pins
#define LDR1 A0
#define LDR2 A1
//define the error value.you can change it as you like
#define error 10
//Starting point of the servo motor
int Spoint=90;
//create object of the servomotor
Servo Servo;
void setup() 
{
  // put your setup code here, to run once:
  //include servo motor pwm pin

Servo.attach(11);
//set the starting point of the servo
Servo.write(Spoint);
delay(1000);
}

void loop() {

//get the ldr sensor value

  int ldr1=analogRead(LDR1);
  //get thr ldr sensor value

   int ldr2=analogRead(LDR2);
  int value1=abs(ldr1-ldr2);
    int value2=abs(ldr2-ldr1);
    if (value1<=error)||value2<=error)
    {
 }
 else
 { 
   if(ldr1>ldr2)

   Spoint=--Spoint;
 }
 if(ldr1<ldr2){
 Spoint=++Spoint;
  }
    // put your main code here, to run repeatedly:

}
Servo.write(Spoint);
delay(80);