#include <avr/io.h>
#include <Servo_megaTinyCore.h>

const int photoA = 2;  // Connect the phototransistor to the analog input pin
const int photoB = 8;  // Connect the phototransistor to the analog input pin
const int ledPin = 9; // Connect the LED to digital pin 9
const int buttonPin = 0; // connect to button
int buttonState= LOW; // create buttonState variable
int lastButtonState = LOW; // create a lastButtonState variable
int pos= 0; // Create a servo variable and set to zero

Servo myservo;  // create servo object to control a servo



void setup() {
  pinMode(ledPin, OUTPUT);  // Set the LED pin as an output
  pinMode(buttonPin, INPUT); // Set button pin as input
  

 myservo.attach(3);  // attaches the servo on pin 9 to the servo object 
}

void loop() {
  int lightLevel1 = analogRead(photoA);  // Read the analog value from the phototransistor
  int lightLevel2 = analogRead(photoB);  // Read the analog value from the phototransistor
  int buttonRead= digitalRead(buttonPin);   // Read the state of the button

  if (buttonRead != lastButtonState){ // Compare button position
    delay(50); // Debounce
    buttonRead = digitalRead(buttonPin);
  }
  if (buttonRead != lastButtonState) { // check button position
    buttonState = buttonRead;
   
  }

  if (lightLevel1 < lightLevel2) {  // Compare light level
   
    myservo.write(pos=180);
 
  } else if (lightLevel2 < lightLevel1 ){ Compare light level
    myservo.write(pos=0);
  }
  if (buttonState == HIGH) { // Compare button position
    digitalWrite(ledPin,! digitalRead(ledPin));
  }
  lastButtonState = buttonRead;
  
  
  delay(150); // Debounce
}