//✓ - car moving randomly for 60 sec
//✓ - after 50 sec buzzer turnes on for 10 sec
//✓ - when time is 60+ sec car and buzzer turn off
//✓ - main if statment if loud noise withing 60 sec turn of arduino


int State = LOW;
long previousMillis = 0;

long interval = 1000;
long totalTime = 60000;

long BuzzerTime = 40000;

int t = 548;
int analogValue = 0;
int flag = 0;

#define motor1pin1 2
#define motor1pin2 3
#define motor2pin1 4
#define motor2pin2 5
#define Buzzer     6
#define Sound_Pin  A0

///////////////////////////////////////////////////////////////////////////////////////////
void setup() {
  flag = 0;
  initOutputs();
  Serial.begin(9600);
}
///////////////////////////////////////////////////////////////////////////////////////////


///////////////////////////////////////////////////////////////////////////////////////////
void loop() {
  unsigned long currentMillis = millis();
  analogValue = analogRead(Sound_Pin);

  if ((currentMillis >= totalTime) && flag == 0) {
    Serial.println("1st if Statment");
    flag = 1;
  }

  if ((currentMillis >= BuzzerTime) && flag == 0) {
    Serial.println("2nd if Statment");
    digitalWrite(Buzzer, 1);
  }

  //***************************************************
  // start of TotalTime
  if ((currentMillis < totalTime) && (analogValue < t) && (flag == 0)) {
    if (currentMillis - previousMillis >= interval) {
      previousMillis = currentMillis;
      Serial.println("3rd if Statment");
      digitalWrite(Buzzer, 0);
      moveCarRandomly();
    }
    else {
      previousMillis = currentMillis;
      Serial.println("1st else Statment");
      digitalWrite(Buzzer, 0);
      moveCarRandomly();
    }
  }//end of TotalTime
  //***************************************************

  else {
    Serial.println("2nd else Statment");
    flag = 1;
    digitalWrite(Buzzer, 0);
    Stop();
  }
}// end of loop
///////////////////////////////////////////////////////////////////////////////////////////


///////////////////////////////////////////////////////////////////////////////////////////

void moveCarRandomly() {
  if (State == LOW) {
    State = HIGH;
    front();
    delay(500);
  }
  else {
    State = LOW;
    right();
    delay(500);
  }
}

void initOutputs() {
  pinMode(Sound_Pin, INPUT);
  pinMode(motor1pin1, OUTPUT);
  pinMode(motor1pin2, OUTPUT);
  pinMode(motor2pin1, OUTPUT);
  pinMode(motor2pin2, OUTPUT);
  pinMode(Buzzer, OUTPUT);
  digitalWrite(motor1pin1, 0);
  digitalWrite(motor1pin2, 0);
  digitalWrite(motor2pin1, 0);
  digitalWrite(motor2pin2, 0);
  digitalWrite(Buzzer, 0);
}

void front() {
  digitalWrite(motor1pin1, HIGH);
  digitalWrite(motor1pin2, LOW);

  digitalWrite(motor2pin1, LOW);
  digitalWrite(motor2pin2, HIGH);

}


void right() {
  digitalWrite(motor1pin1, LOW);
  digitalWrite(motor1pin2, HIGH);

  digitalWrite(motor2pin1, LOW);
  digitalWrite(motor2pin2, HIGH);
}


void Stop() {
  digitalWrite(motor1pin1, LOW);
  digitalWrite(motor1pin2, LOW);

  digitalWrite(motor2pin1, LOW);
  digitalWrite(motor2pin2, LOW);
}