#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 20, 4); // I2C address 0x27, 16 column and 2 rows




void setup()
{
  lcd.init(); // initialize the lcd
  lcd.backlight();

  //lcd.setCursor(0, 0);         // move cursor to   (0, 0)
  //lcd.print("0.0");        // print message at (0, 0)
  //lcd.setCursor(2, 1);         // move cursor to   (2, 1)
  //lcd.print(3.0); // print message at (2, 1)
  pinMode(A0, OUTPUT);
}


void loop()
{
 int y;

for (int i = 0; i < 61; i++){
     y = round (random (0,3));
        
      lcd.setCursor(0,0);
      lcd.print("Loop Counter ");
      lcd.print(i);
      
      //lcd.print(y);
      WriteOutput(y);
    }
 //WriteOutput(3);
    
}

void WriteOutput(int index){
int delayperiod, gi;
lcd.setCursor(0,1);
lcd.print("index ");
lcd.print(index);

switch (index){
  case 2: 
     delayperiod = 800;
  break;
  case 1 :
     delayperiod = 500;
   break;
  case 0 :
     delayperiod = 200;
  break;
  default :
    delayperiod = 1000;
  break;
  }
  analogWrite(A0, 100);
  lcd.setCursor(0,2);
  lcd.print(delayperiod);
  delay(delayperiod);
  analogWrite(A0, 255);
  delay((1000 - delayperiod));
 return;

}