#include "Wire.h"
#include "LiquidCrystal_I2C.h"
LiquidCrystal_I2C LCD(0x27, 16, 2);

#include "RotaryEncoder.h"
RotaryEncoder encoder(4, 5);  // DT, CLK

#define STEPS  6
#define POSMIN 0
#define POSMAX 12

int lastPos, newPos;
boolean buttonWasUp = true;

void setup() {
   LCD.init();
   LCD.backlight();

   pinMode(9, OUTPUT);   // LED blue
   pinMode(10, OUTPUT);  // LED green
   pinMode(11, OUTPUT);  // LED red
   pinMode(2, INPUT_PULLUP);  // SW

   Serial.begin(9600);
   encoder.setPosition(10 / STEPS);
}

void loop() {
   LCD.setCursor(0, 0);
   LCD.print("LED1  LED2  LED3");
   encoder.tick();
   newPos = encoder.getPosition() * STEPS;
   if (newPos < POSMIN) { 
      encoder.setPosition(POSMIN / STEPS);
      newPos = POSMIN;
   }
   else if (newPos > POSMAX) {
      encoder.setPosition(POSMAX / STEPS);
      newPos = POSMAX;
   }
   if (lastPos != newPos) {
      Serial.println(newPos);
      LCD.setCursor(lastPos, 1);
      LCD.print("    ");
      LCD.setCursor(newPos, 1);
      LCD.print("====");
      lastPos = newPos;
   }

   boolean buttonIsUp = digitalRead(2);
   if (buttonWasUp && !buttonIsUp) {
      delay(10);
      buttonIsUp = digitalRead(2);
      if (!buttonIsUp  && newPos == 0) {
         digitalWrite(9,HIGH); digitalWrite(10,LOW); digitalWrite(11,LOW);
      }
      if (!buttonIsUp  && newPos == 6) {
         digitalWrite(9,LOW); digitalWrite(10,HIGH); digitalWrite(11,LOW);
      }
      if (!buttonIsUp  && newPos == 12) {
         digitalWrite(9,LOW); digitalWrite(10,LOW); digitalWrite(11,HIGH);
      }
   }

}