#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27,16,2);

void setup() {
  // put your setup code here, to run once:
  pinMode(2, INPUT);
  analogWrite(A0, 130);
  analogWrite(A1, 70);
  analogWrite(A2, 180);
  lcd.init();
  lcd.backlight();
  printLCD(130,70,180);
}

void loop() {
  // put your main code here, to run repeatedly:
  if(digitalRead(2) == HIGH){
    int i = int(random(0,256));
    int j = int(random(0,256));
    int k = int(random(0,256));
    analogWrite(A0, i);
    analogWrite(A1, j);
    analogWrite(A2, k);
    printLCD(i,j,k);
  }
}

void printLCD(int i, int j, int k){
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print(i);
  lcd.setCursor(8,0);
  lcd.print(j);
  lcd.setCursor(0,1);
  lcd.print(k);
}