#include <LiquidCrystal_I2C.h>
#include <Wire.h>
// About Sw-case https://www.freecodecamp.org/news/how-to-use-switch-case-in-arduino-control-leds/
int potValue;
int mappedPotValue;
//int Pot1 = analogRead(11);

LiquidCrystal_I2C lcd(0x27,20,4);

void setup() {
   lcd.init();                      // initialize the lcd 
  lcd.backlight();
  Serial.begin(9600);


  pinMode(A0, INPUT);//Potentiomtr

  pinMode(5,OUTPUT);
  pinMode(2, OUTPUT);
  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT);
  // put your setup code here, to run once:

}

void loop() {
 
//Serial.print(Pot1);
potValue = analogRead(A0);
mappedPotValue = map(potValue, 0, 1023, 0 , 3);

Serial.println(potValue);
delay(390);

lcd.setCursor(3,0);
  lcd.print("Relay is:");
lcd.setCursor(9,1);
  lcd.print(mappedPotValue);
lcd.setCursor(2,1);
 

  switch(mappedPotValue){
      case 0:

      digitalWrite(2, HIGH);
      digitalWrite(5, LOW);
      digitalWrite(3, LOW);
       
      Serial.println("1stRelay");
       lcd.println("1stRelay");
       lcd.clear();
        // statements
        break;
      case 1:
      Serial.println("2stRelay");
       digitalWrite(3, HIGH);
       digitalWrite(2, LOW);
             lcd.println("2ndRelay");
       lcd.clear();
        break;
      case 2:
          Serial.println("3stRelay");
          digitalWrite(4, HIGH);
          digitalWrite(3, LOW);

          lcd.println("3rdRelay");
       lcd.clear();
      break;
 
      case 3:
       digitalWrite(5, HIGH);
       digitalWrite(4, LOW);
      Serial.println("4th Relay");

            lcd.println("4thRelay");
       lcd.clear(); 
     //default:
        break;
        
  delay(500);
  lcd.clear();
    }
  /*
// if(analogRead(3 == 500))
  {
  delay(500);
  Serial.println("On");
  digitalWrite(5, HIGH);
  }
  else
  {
    delay(500);
   Serial.print("FF");
 digitalWrite(5, LOW);
  }
*/
}