#define type 1    
/*
 * 1: for the step2.1 Standard conditions
 * 2: for the step2.2 Sporadically uncontrollable conditions
 */

#define freq_i 2  // frequency of inverse;
int counter_open;

void setup() {
  Serial.begin(9600);
  pinMode(12, OUTPUT);  //output close signal to the board
  pinMode(13, OUTPUT);  //output open signal to the board
  pinMode(2, OUTPUT);   //output signal to the close botton
  pinMode(4, OUTPUT);   //output signal to the open botton
  pinMode(7, INPUT);    //input signal from the close botton
  pinMode(8, INPUT);    //input signal from the open botton

  digitalWrite(2, HIGH);    //always HIGH
  digitalWrite(4, HIGH);    //always HIGH
  counter_open = 1;

}

void loop() {
  int val_7 = LOW;
  int val_8 = LOW;
  
  val_7 = digitalRead(7);
  Serial.print("pin 7 = ");
  Serial.println(val_7);
  
  val_8 = digitalRead(8);
  Serial.print("pin 8 = ");
  Serial.println(val_8);

  if(type==1){
    if((val_7 == HIGH) && (val_8 != HIGH)){
    for(int i=0; i<256; i++){
      digitalWrite(12, HIGH);
      val_7 = digitalRead(7);
      Serial.println(val_7);
      if(val_7 == LOW){
        digitalWrite(12, LOW);
        break;
        }
       }
     }
   else if((val_8 == HIGH) && (val_7 != HIGH)){
    for(int i=0; i<256; i++){
      digitalWrite(13, HIGH);
      val_8 = digitalRead(8);
      Serial.println(val_8);
      if(val_8 == LOW){
        digitalWrite(13, LOW);
        counter_open += 1;
        break;
        }
      }
    }
    else{
    digitalWrite(12, LOW);
    digitalWrite(13, LOW);
  }
  else if(type==2){
    if((val_7 == HIGH) && (val_8 != HIGH)){
      int pinno= random(12, 14);
      for(int i=0; i<256; i++){
      digitalWrite(pinno, HIGH);
      val_7 = digitalRead(7);
      Serial.println(val_7);
      if(val_7 == LOW){
        digitalWrite(pinno, LOW);
        break;
        }
       }
     }
   else if((val_8 == HIGH) && (val_7 != HIGH)){
    int pinno= random(12, 14);
    for(int i=0; i<256; i++){
      digitalWrite(pinno, HIGH);
      val_8 = digitalRead(8);
      Serial.println(val_8);
      if(val_8 == LOW){
        digitalWrite(pinno, LOW);
        break;
        }
      }
    }
  else{
    digitalWrite(12, LOW);
    digitalWrite(13, LOW);
    }
  }

  else{                         //for the safe
    digitalWrite(12, LOW);
    digitalWrite(13, LOW);
    }
}