#include <LiquidCrystal.h>

LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

int temprature = 0;
int celsius = 0;
int fahrenheit=0;
int led1 = 10;
int led2 = 9;
int led3 = 8;

void setup()
{
  lcd.begin(16, 2);
  lcd.print(celsius);

  pinMode(A0, INPUT);
  Serial.begin(9600);
  pinMode(10, OUTPUT);
  pinMode(9, OUTPUT);
  pinMode(8, OUTPUT);
}

void loop()
{
 lcd.setCursor(1, 1);



 temprature = 10;

  celsius = map(((analogRead(A0) - 20) * 3.04), 0, 1023, -40, 125);

  fahrenheit = ((celsius * 9) / 5 + 32);
  Serial.print(celsius);
  Serial.print(" C, ");
  Serial.print(fahrenheit);
  Serial.println(" F");

  if (celsius < temprature)
  {
 digitalWrite(2, LOW);
 digitalWrite(3, LOW);
 digitalWrite(4, LOW);
  }
  if (celsius >= temprature && celsius < temprature + 10)
  {
    digitalWrite(2, HIGH);
    digitalWrite(3, LOW);
    digitalWrite(4, LOW);
  }
  if (celsius >= temprature + 10 && celsius < temprature + 20)
  {
    digitalWrite(2, HIGH);
    digitalWrite(3, HIGH);
    digitalWrite(4, LOW);
  }
  if (celsius >= temprature + 20 && celsius < temprature + 30)
  {
    digitalWrite(2, HIGH);
    digitalWrite(3, HIGH);
    digitalWrite(4, HIGH);
  }
  if (celsius >= temprature + 30)
  {
    digitalWrite(2, HIGH);
    digitalWrite(3, HIGH);
    digitalWrite(4, HIGH);
  }
  lcd.begin(16, 2);
  lcd.print(celsius);
  lcd.print("C");
  lcd.setCursor(0,1);
  lcd.print(fahrenheit);
  lcd.print("F");
}