const int triggerPin = 8;
const int fanPin = 9;
const int coilPin = 13;
const int period = 50;
const int temperaturePin = A3;    // select the input pin for the temperature sensor
int temperature = 0;  // variable to store the value coming from the temperature sensor

void setup() {
  pinMode(coilPin, OUTPUT);  
  pinMode(fanPin, OUTPUT);  
  pinMode(triggerPin, INPUT);
  Serial.begin(9600);
}

void loop() {
  // read the value from the temperature sensor:
  temperature = (5.0 * analogRead(temperaturePin) * 100.0) / 1024.0;
  Serial.print(temperature, DEC);
  Serial.print("\n");
  
  int trigger = digitalRead(triggerPin);
  //Serial.print(digitalRead(triggerPin));
  if(temperature < 80){
    digitalWrite(fanPin, HIGH);
    if(trigger == LOW){
      digitalWrite(coilPin, HIGH);
      delay(period);
      digitalWrite(coilPin, LOW);
      delay(period);
    }
    else{
      //digitalWrite(fanPin, LOW);
    }
  }
  if(temperature > 30){
    digitalWrite(fanPin, HIGH);
  }
}