#include <Wire.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C mylcd(0x27,16,2);
volatile int R;
volatile int G;
volatile int B;

void setup(){
  mylcd.init();
  mylcd.backlight();
  R = 0;
  G = 0;
  B = 0;
  pinMode(A0, INPUT);
  pinMode(A1, INPUT);
  pinMode(A2, INPUT);
  pinMode(11, OUTPUT);
  pinMode(10, OUTPUT);
  pinMode(9, OUTPUT);
}

void loop(){
  R = (map(digitalRead(A0), 0, 1023, 0, 255));
  G = (map(digitalRead(A1), 1, 1023, 0, 255));
  B = (map(digitalRead(A2), 0, 1023, 0, 255));
  mylcd.clear();
  mylcd.setCursor(0, 0);
  mylcd.print(String("R") + String(R) + String("G") + String(G) + String("B") + String(B));
  mylcd.setCursor(0, 1);
  mylcd.print("");
  // R
  analogWrite(11, 225);
  // G
  analogWrite(10, 0);
  // B
  analogWrite(9, 0);

}