#include <Servo.h>
int ldrPin1 = A0;
int ldrPin2 = A1;
const float GAMMA = 0.7;
const float RL10 = 50;
Servo myServo;

int servoPin = 3;

float valueLux (float val) {
  float ldrVal = (val); 
  float voltage = ldrVal / 1024. * 5;
  float resistance = 2000 * voltage / (1 - voltage / 5);
  float lux = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance, (1 / GAMMA));
  return lux;
}

void setup() {
  myServo.attach(servoPin);

}

void loop() {
  float ldrVal1 = analogRead(ldrPin1);
  float lux1 = valueLux(ldrVal1);

  float ldrVal2 = analogRead(ldrPin2);
  float lux2 = valueLux(ldrVal2);

  if(lux1 > lux2) {
    myServo.write(0);
  } else if(lux1 < lux2) {
    myServo.write(180);
  } else if(lux1 = lux2) {
    myServo.write(90);
  }
}