#include <DHT.h> 

#define DHTPIN 7       
#define DHTTYPE DHT22  
DHT dht(DHTPIN, DHTTYPE); 

float hum;  
float temp; 
const int HigherTemp = 27; 
const int LowerTemp = 15;  

enum State {
  Red,
  Green,
  Blue
};

State currentState ;
const int LED1_Red = 2;       
const int LED3_Green = 3; 
const int LED2_Blue = 4;

void setup() {
  Serial.begin(9600);
  pinMode(LED1_Red, OUTPUT);
  pinMode(LED2_Blue, OUTPUT);
  pinMode(LED3_Green, OUTPUT);
  dht.begin();
}

void loop() {
  hum = dht.readHumidity();
  temp = dht.readTemperature();
  
  
  if (temp >= LowerTemp && temp <= HigherTemp) {
    currentState = Green;
  } else if (temp < LowerTemp) {
    currentState = Blue;
  } else if (temp > HigherTemp) {
    currentState = Red;
  }

  
  switch (currentState) {
    case Green:
      digitalWrite(LED1_Red, LOW);
      digitalWrite(LED2_Blue, LOW);
      digitalWrite(LED3_Green, HIGH);
      delay (2000);
      break;

    case Blue:
      digitalWrite(LED1_Red, LOW);
      digitalWrite(LED2_Blue, HIGH);
      digitalWrite(LED3_Green, LOW);
      delay (2000);

      break;

    case Red:
      digitalWrite(LED1_Red, HIGH);
      digitalWrite(LED2_Blue, LOW);
      digitalWrite(LED3_Green, LOW);
      delay (2000);
      break;
  }
}