#include <Wire.h> 
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,24,2);

void setup()
{
  for (int x=2 ; x<10 ; x++ )
  {
    pinMode(x,OUTPUT);
  }
  pinMode(12,INPUT);
  pinMode(13,INPUT);
  Serial.begin(115200);

  lcd.init();
  lcd.backlight();
  lcd.setCursor(3,0);
  lcd.print("Hello, world!");
  lcd.setCursor(2,1);
  lcd.print("Ywrobot Arduino!");
}


void loop()
{
  int VR = analogRead(A0);
  int PWM = map(VR,0,1023 ,0 ,255);
  int SW1 = digitalRead(12);
  int SW2 = digitalRead(13);
 if(SW1==1)
  {
    if (VR<50){
    for(int i=0;i<3;i++){
     digitalWrite(2,HIGH);
     delay(500);
          digitalWrite(3,HIGH);
          delay(500);
               digitalWrite(4,HIGH);
               delay(500);
                    digitalWrite(5,HIGH);
                    delay(500);
                         digitalWrite(6,HIGH);
                         delay(500);
                              digitalWrite(7,HIGH);
                              delay(500);
                                   digitalWrite(8,HIGH);
     delay(500);
     digitalWrite(2, LOW);
     digitalWrite(3, LOW);
     digitalWrite(4, LOW);
     digitalWrite(5, LOW);
     digitalWrite(6, LOW);
     digitalWrite(7, LOW);
     digitalWrite(8, LOW);
     delay(500);
    
    }
    }
  
  }

else if (SW2==1)
  {
 if (VR>50)
  {
    for(int i=0;i<3;i++){
      digitalWrite(8,HIGH);
          digitalWrite(7,HIGH);
          delay(500);
               digitalWrite(6,HIGH);
                    digitalWrite(5,HIGH);
                    delay(500);
                         digitalWrite(4,HIGH);
                              digitalWrite(3,HIGH);
                              delay(500);
                                   digitalWrite(2,HIGH);
     delay(500);
     digitalWrite(2, LOW);
     digitalWrite(3, LOW);
     digitalWrite(4, LOW);
     digitalWrite(5, LOW);
     digitalWrite(6, LOW);
     digitalWrite(7, LOW);
     digitalWrite(8, LOW);
     delay(500);
    }
   }
  }

  else
  {
  lcd.print("VR Value = ");
  lcd.print(VR);
  lcd.setCursor(0,1);
  lcd.print("PWM Value = ");
  lcd.print(PWM);
  delay(1000);
  lcd.clear();
  }
}