#include <Servo.h>

Servo valve;

const int open = 130;
const int close = 0;
const int ignition = 4; 
const int fuel = 2;
const int buzzer = 3;

void setup() {
  valve.attach(12);

  pinMode(ignition, OUTPUT);
  pinMode(fuel, OUTPUT);
  
  pinMode(buzzer, OUTPUT);

  digitalWrite(ignition, LOW);
  digitalWrite(fuel, LOW);
  valve.write(close);
}

void loop() {

  digitalWrite(fuel, HIGH);
  valve.write(open);
  delay(1500);
  digitalWrite(fuel, LOW);
  delay(2500);
 
  valve.write(close);
  delay(1000);

  warn();
  digitalWrite(fuel, HIGH);
  delay(1000);
  fire();

  delay(1000);

  valve.write(open);
  
  delay(30*1000);
}

void fire(){
  digitalWrite(ignition, HIGH);
  delay(250);
  digitalWrite(ignition, LOW);
  delay(1000);
}

void warn(){

  digitalWrite(buzzer, HIGH);
  delay(1000);
  digitalWrite(buzzer, LOW);
  delay(400);

  digitalWrite(buzzer, HIGH);
  delay(100);
  digitalWrite(buzzer, LOW);
  delay(100);
  digitalWrite(buzzer, HIGH);
  delay(100);
  digitalWrite(buzzer, LOW);
  delay(100);
  digitalWrite(buzzer, HIGH);
  delay(100);
  digitalWrite(buzzer, LOW);
  delay(100);
}