#include <Servo.h>
Servo myservo;
#define ldr1pin A1
#define ldr2pin A0
int angle = 90;
int threshold = 20;
void setup() {
  myservo.attach(13);
  myservo.write(angle);
  Serial.begin(9600);
  



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

}

void loop() {
  int ldr1value = analogRead(ldr1pin);
  int ldr2value = analogRead(ldr2pin);
  if (((ldr1value-ldr2value)<threshold)||((ldr2value-ldr1value)<threshold)){

  }
  else{
    if(ldr1value>ldr2value){
      angle--;
    }
    else{
      angle++;
    }
    angle.constrain(angle,75,120);
    myservo.write(angle);

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

}