int LED1 = 13;
int LED2 = 12;
int LED3 = 11;
int LED4 = 10;
int LED5 = 9;

void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);
pinMode(LED1, OUTPUT);
pinMode(LED2, OUTPUT);
pinMode(LED3, OUTPUT);
pinMode(LED4, OUTPUT);
pinMode(LED5, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
const float BETA = 3950;
int analogValue = analogRead(A1);
float temp = 1 / (log(1 / (1023. / analogValue - 1)) / BETA + 1.0 / 298.15) - 273.15;

Serial.println(temp);
if (temp>=-24 && temp<=0) {
  digitalWrite(LED1, HIGH); 
  digitalWrite(LED2, LOW); 
  digitalWrite(LED3, LOW); 
  digitalWrite(LED4, LOW); 
  digitalWrite(LED5, LOW); 
}
else if (temp>=1 && temp<=20) {
  digitalWrite(LED1, HIGH); 
  digitalWrite(LED2, HIGH); 
  digitalWrite(LED3, LOW); 
  digitalWrite(LED4, LOW); 
  digitalWrite(LED5, LOW); 
}
else if (temp>=21 && temp<=40) {
  digitalWrite(LED1, HIGH); 
  digitalWrite(LED2, HIGH); 
  digitalWrite(LED3, HIGH); 
  digitalWrite(LED4, LOW); 
  digitalWrite(LED5, LOW); 
}
else if (temp>=41 && temp<=60) {
  digitalWrite(LED1, HIGH); 
  digitalWrite(LED2, HIGH); 
  digitalWrite(LED3, HIGH); 
  digitalWrite(LED4, HIGH); 
  digitalWrite(LED5, LOW); 
}
else if (temp>=61 && temp<=80) {
  digitalWrite(LED1, HIGH); 
  digitalWrite(LED2, HIGH); 
  digitalWrite(LED3, HIGH); 
  digitalWrite(LED4, HIGH); 
  digitalWrite(LED5, HIGH); 
}

}