/*
  digitalWrite(a, HIGH);
  digitalWrite(b, HIGH);
  digitalWrite(c, HIGH);
  digitalWrite(d, HIGH);
  digitalWrite(e, HIGH);
  digitalWrite(f, HIGH);
  digitalWrite(g, HIGH);
  digitalWrite(h, HIGH);
*/


int a = 12;
int b = 11;
int c = 10;
int d = 9;
int e = 8;
int f = 7;
int g = 6;
int h = 5;


int btnPin1 = 1;
int btnPin2 = 2;
int btnPin3 = 3;
int btnPin4 = 4;

int buttonState1 = 1;
int buttonState2 = 1;
int buttonState3 = 1;
int buttonState4 = 1;


void allOn(){
  digitalWrite(a, LOW);
  digitalWrite(b, LOW);
  digitalWrite(c, LOW);
  digitalWrite(d, LOW);
  digitalWrite(e, LOW);
  digitalWrite(f, LOW);
  digitalWrite(g, LOW);
  digitalWrite(h, LOW);
}


void allOff(){
  digitalWrite(a, HIGH);
  digitalWrite(b, HIGH);
  digitalWrite(c, HIGH);
  digitalWrite(d, HIGH);
  digitalWrite(e, HIGH);
  digitalWrite(f, HIGH);
  digitalWrite(g, HIGH);
  digitalWrite(h, HIGH);
}


   void zero(){
      digitalWrite(a, LOW);
      digitalWrite(b, LOW);
      digitalWrite(c, LOW);
      digitalWrite(d, LOW);
      digitalWrite(e, LOW);
      digitalWrite(f, LOW);
      digitalWrite(g, LOW);
      digitalWrite(h, HIGH);
    }



    void one(){
      digitalWrite(a, HIGH);
      digitalWrite(b, LOW);
      digitalWrite(c, HIGH);
      digitalWrite(d, HIGH);
      digitalWrite(e, HIGH);
      digitalWrite(f, HIGH);
      digitalWrite(g, LOW);
      digitalWrite(h, HIGH);
    }

    void two(){
      digitalWrite(a, LOW);
      digitalWrite(b, LOW);
      digitalWrite(c, HIGH);
      digitalWrite(d, HIGH);
      digitalWrite(e, LOW);
      digitalWrite(f, LOW);
      digitalWrite(g, HIGH);
      digitalWrite(h, LOW);
    }

    void three(){
        digitalWrite(a, LOW);
        digitalWrite(b, HIGH);
        digitalWrite(c, LOW);
        digitalWrite(d, HIGH);
        digitalWrite(e, LOW);
        digitalWrite(f, LOW);
        digitalWrite(g, HIGH);
        digitalWrite(h, LOW);
    }

    void four(){
      digitalWrite(a, HIGH);
      digitalWrite(b, HIGH);
      digitalWrite(c, LOW);
      digitalWrite(d, HIGH);
      digitalWrite(e, LOW);
      digitalWrite(f, HIGH);
      digitalWrite(g, LOW);
      digitalWrite(h, LOW);
    }


    void five(){
      digitalWrite(a, LOW);
      digitalWrite(b, HIGH);
      digitalWrite(c, LOW);
      digitalWrite(d, HIGH);
      digitalWrite(e, HIGH);
      digitalWrite(f, LOW);
      digitalWrite(g, LOW);
      digitalWrite(h, LOW);
    }

    void six(){
      digitalWrite(a, LOW);
      digitalWrite(b, LOW);
      digitalWrite(c, LOW);
      digitalWrite(d, HIGH);
      digitalWrite(e, HIGH);
      digitalWrite(f, LOW);
      digitalWrite(g, LOW);
      digitalWrite(h, LOW);
    }

    void seven(){
      digitalWrite(a, HIGH);
      digitalWrite(b, HIGH);
      digitalWrite(c, LOW);
      digitalWrite(d, HIGH);
      digitalWrite(e, LOW);
      digitalWrite(f, LOW);
      digitalWrite(g, HIGH);
      digitalWrite(h, HIGH);
    }

    void eight(){
      digitalWrite(a, LOW);
      digitalWrite(b, LOW);
      digitalWrite(c, LOW);
      digitalWrite(d, HIGH);
      digitalWrite(e, LOW);
      digitalWrite(f, LOW);
      digitalWrite(g, LOW);
      digitalWrite(h, LOW);
    }

    void nine(){
      digitalWrite(a, LOW);
      digitalWrite(b, HIGH);
      digitalWrite(c, LOW);
      digitalWrite(d, HIGH);
      digitalWrite(e, LOW);
      digitalWrite(f, LOW);
      digitalWrite(g, LOW);
      digitalWrite(h, LOW);
    }


    void warmUp(){
        zero();
        delay(1000);
        one();
        delay(1000);
        two();
        delay(1000);
        three();
        delay(1000);
        four();
        delay(1000);
        five();
        delay(1000);
        six();
        delay(1000);
        seven();
        delay(1000);
        eight();
        delay(1000);
        nine();
        delay(1000);
    }

    void dot(){
        digitalWrite(a, HIGH);
        digitalWrite(b, HIGH);
        digitalWrite(c, HIGH);
        digitalWrite(d, LOW);
        digitalWrite(e, HIGH);
        digitalWrite(f, HIGH);
        digitalWrite(g, HIGH);
        digitalWrite(h, HIGH);
    }

    void loading(){
      dot();
      delay(200);
      allOff();
      delay(200);
      dot();
      delay(200);
      allOff();
      delay(200);
      dot();
      delay(200);
      allOff();
      delay(200);
      dot();
      delay(200);
    }


void setup() {
  pinMode(a, OUTPUT);
  pinMode(b, OUTPUT);
  pinMode(c, OUTPUT);
  pinMode(d, OUTPUT);
  pinMode(e, OUTPUT);
  pinMode(f, OUTPUT);
  pinMode(g, OUTPUT);
  pinMode(h, OUTPUT);


  pinMode(btnPin1, INPUT);
  pinMode(btnPin2, INPUT);
  pinMode(btnPin3, INPUT);
  pinMode(btnPin4, INPUT);
}

// the loop function runs over and over again forever
void loop() {
  buttonState1 = digitalRead(btnPin1);
  buttonState2 = digitalRead(btnPin2);
  buttonState3 = digitalRead(btnPin3);
  buttonState4 = digitalRead(btnPin4);


  if (buttonState1 == LOW && buttonState2 == LOW && buttonState3 == LOW && buttonState4 == LOW) {
    zero();
  } else if (buttonState1 == LOW && buttonState2 == LOW && buttonState3 == LOW && buttonState4 == HIGH) {
    one();
  } else if (buttonState1 == LOW && buttonState2 == LOW && buttonState3 == HIGH && buttonState4 == LOW) {
    two();
  } else if (buttonState1 == LOW && buttonState2 == LOW && buttonState3 == HIGH && buttonState4 == HIGH) {
    three();
  } else if (buttonState1 == LOW && buttonState2 == HIGH && buttonState3 == LOW && buttonState4 == LOW) {
    four();
  } else if (buttonState1 == LOW && buttonState2 == HIGH && buttonState3 == LOW && buttonState4 == HIGH) {
    five();
  } else if (buttonState1 == LOW && buttonState2 == HIGH && buttonState3 == HIGH && buttonState4 == LOW) {
    six();
  } else if (buttonState1 == LOW && buttonState2 == HIGH && buttonState3 == HIGH && buttonState4 == HIGH) {
    seven();
  } else if (buttonState1 == HIGH && buttonState2 == LOW && buttonState3 == LOW && buttonState4 == LOW) {
    eight();
  } else if (buttonState1 == HIGH && buttonState2 == LOW && buttonState3 == LOW && buttonState4 == HIGH) {
    nine();
  } else {
    loading();
  }
}