void setup() {

  Serial.begin(9600);

  //setting button pin as input and LOW

  pinMode(12, INPUT);
  digitalWrite(12, LOW); //DEBOUNCE relevant


  //setting input pins as output

  int act_pin[6] = {A0, A1, A2, A3, A4};

  int k = 0;

  for (k = 0; k < 5; k++) {

      pinMode(act_pin[k], OUTPUT);

    }


  //setting state pins as output

  int z_pin[5] = {2, 3, 4, 5};

  int a = 0;

  for (a = 0; a < 4; a++) {

      pinMode(z_pin[a], OUTPUT);

   }


  //setting output pins as output

  int out_pin[6] = {9, 10, 11};

  int b = 0;

  for (b = 0; b < 3; b++) {

      pinMode(out_pin[b], OUTPUT);

   }


  //setting input

  for(k = 0; k < 5; k++) {

      randomSeed(analogRead(5));

      int i = random(2);


      if(i == 1){

         digitalWrite(act_pin[k], HIGH);

         input[k] = 1;

         Serial.print(input[k]);

      }

       else{

         digitalWrite(act_pin[k], LOW);

         input[k] = 0;

         Serial.print(input[k]);


      }

    }

   //setting initial situation

   digitalWrite(2, LOW);
   digitalWrite(3, HIGH);
   digitalWrite(4, LOW);
   digitalWrite(5, LOW);


   }

//DEBOUNCING

long lastDebounceTime = 0;  // the last time the button pin was toggled
long debounceDelay = 50;    // the debounce time; increase if the output flickers
int buttonState;

//DEBOUNCING


boolean button_prev = 0;

boolean button = 0;

int j = 0; //value shows current lamp being processed

//setting initial state

char z[4] = "z_0";

void loop() {

    button_prev = button;

    button = digitalRead(8); //DEBOUNCE relevant

    // DEBOUNCING
    if (button != button_prev) {

    lastDebounceTime = millis();

    }

    if ((millis() - lastDebounceTime) > debounceDelay) {

       if (button != button_prev) {
     //DEBOUNCING

         if (!button_prev && button) {

          int e = input[j];

           //provides a nice output
            Serial.println(" ");
            Serial.print("Current lamp being processed:");
            Serial.println(j);
            Serial.println(" ");
            Serial.print("Current input:");
            Serial.println(e);


             delta(e, z);

            Serial.print("State outside function:");
            Serial.println(z);

            lamda(e, z);

             j = (j+1) % 5;

      }


    }

   }
}