#include <Arduino.h>
#include <RotaryEncoder.h>
#define LED_PIN1 2
#define LED_PIN2 3
#define LED_PIN3 4
#define LED_PIN4 5
#define BUTTON_PIN 7

byte lastButtonState = LOW;
byte ledState = LOW;
#if defined(ARDUINO_AVR_NANO) || defined(ARDUINO_AVR_NANO_EVERY)
// Example for Arduino UNO with input signals on pin 2 and 3
#define PIN_IN1 A2
#define PIN_IN2 A3
#endif
RotaryEncoder encoder(PIN_IN1, PIN_IN2, RotaryEncoder::LatchMode::TWO03);

void setup()
{
 // Serial.begin(9600);
   pinMode(LED_PIN1, OUTPUT);
    pinMode(LED_PIN2, OUTPUT);
     pinMode(LED_PIN3, OUTPUT);
    pinMode(LED_PIN4, OUTPUT);
  pinMode(BUTTON_PIN, INPUT_PULLUP);
}


// Read the current position of the encoder and print out when changed.
void loop()
{
 // static int pos = 0;
  encoder.tick();
 byte buttonState = digitalRead(BUTTON_PIN);
  int newPos = encoder.getPosition();
  //if (pos != newPos) {
   // Serial.print("pos:");
//Serial.print(newPos);
switch (newPos){
case 0:
   
  if (buttonState != lastButtonState) {
    lastButtonState = buttonState;
    if (buttonState == LOW) {
      ledState = (ledState == HIGH) ? LOW: HIGH;
      digitalWrite(LED_PIN1, ledState);
    }
  }
  break;
  case 2:
   // byte buttonState = digitalRead(BUTTON_PIN);
  if (buttonState != lastButtonState) {
    lastButtonState = buttonState;
    if (buttonState == LOW) {
      ledState = (ledState == HIGH) ? LOW: HIGH;
      digitalWrite(LED_PIN2, ledState);
    }
  }
  break;
  case 4:
   
  if (buttonState != lastButtonState) {
    lastButtonState = buttonState;
    if (buttonState == LOW) {
      ledState = (ledState == HIGH) ? LOW: HIGH;
      digitalWrite(LED_PIN3, ledState);
    }
  }
  break;
  case 6:
   // byte buttonState = digitalRead(BUTTON_PIN);
  if (buttonState != lastButtonState) {
    lastButtonState = buttonState;
    if (buttonState == LOW) {
      ledState = (ledState == HIGH) ? LOW: HIGH;
      digitalWrite(LED_PIN4, ledState);
    }
  }
  break;
} 
}// loop ()

// The End