Digital Würfel by DeKode

//Pins
int pinLED1 = 2;
int pinLED2 = 3;
int pinLED3 = 4;
int pinLED4 = 5;
int pinLED5 = 6;
int pinLED6 = 8;
int pinLED7 = 7;
int pinBtn = 9;

//Var
int stateBusy = 0;
int buttonState = 0;
long ran;


void setup ()
{
//Pinmodes
  pinMode (pinLED1, OUTPUT);
  pinMode (pinLED2, OUTPUT);
  pinMode (pinLED3, OUTPUT);
  pinMode (pinLED4, OUTPUT);
  pinMode (pinLED5, OUTPUT);
  pinMode (pinLED6, OUTPUT);
  pinMode (pinLED7, OUTPUT);
  pinMode (pinBtn, INPUT_PULLUP);
  randomSeed(analogRead(0));
  fLEDTest();
}

void loop()
{
  buttonState = digitalRead(pinBtn);

  if (buttonState == HIGH)
  {
    if (stateBusy == 0)
    {
      stateBusy = 1;
      ran = random(1, 7);

      fLEDClear();  //Clear LEDs before switch new
      switch (ran)
      {
        case 1:
          fLEDOne();
          break;

        case 2:
          fLEDTwo();
          break;

        case 3:
          fLEDThree();
          break;

        case 4:
          fLEDFour();
          break;

        case 5:
          fLEDFive();
          break;

        case 6:
          fLEDSix();
          break;

        default:
          fLEDClear();
          break;
      }
      stateBusy = 0;
    }
  }
}

//## Functions ##

//LED Arrangement:
//  1   5
//  2 4 6
//  3   7

void fLEDClear(){
  //no LEDs on
  digitalWrite (pinLED1, LOW);
  digitalWrite (pinLED2, LOW);
  digitalWrite (pinLED3, LOW);
  digitalWrite (pinLED4, LOW);
  digitalWrite (pinLED5, LOW);
  digitalWrite (pinLED6, LOW);
  digitalWrite (pinLED7, LOW);
}

void fLEDOne(){
  //Number 1 (4)
  digitalWrite (pinLED1, LOW);
  digitalWrite (pinLED2, LOW);
  digitalWrite (pinLED3, LOW);
  digitalWrite (pinLED4, HIGH);
  digitalWrite (pinLED5, LOW);
  digitalWrite (pinLED6, LOW);
  digitalWrite (pinLED7, LOW);
}

void fLEDTwo(){
  //Number 2 (1+7)
  digitalWrite (pinLED1, HIGH);
  digitalWrite (pinLED2, LOW);
  digitalWrite (pinLED3, LOW);
  digitalWrite (pinLED4, LOW);
  digitalWrite (pinLED5, LOW);
  digitalWrite (pinLED6, LOW);
  digitalWrite (pinLED7, HIGH);
}

void fLEDThree(){
  //Number 3 (1,4,7)
  digitalWrite (pinLED1, HIGH);
  digitalWrite (pinLED2, LOW);
  digitalWrite (pinLED3, LOW);
  digitalWrite (pinLED4, HIGH);
  digitalWrite (pinLED5, LOW);
  digitalWrite (pinLED6, LOW);
  digitalWrite (pinLED7, HIGH);
}

void fLEDFour(){
  //Number 4 (1,3,5,7)
  digitalWrite (pinLED1, HIGH);
  digitalWrite (pinLED2, LOW);
  digitalWrite (pinLED3, HIGH);
  digitalWrite (pinLED4, LOW);
  digitalWrite (pinLED5, HIGH);
  digitalWrite (pinLED6, LOW);
  digitalWrite (pinLED7, HIGH);
}

void fLEDFive(){
  //Number 5 (1,3,4,5,7)
  digitalWrite (pinLED1, HIGH);
  digitalWrite (pinLED2, LOW);
  digitalWrite (pinLED3, HIGH);
  digitalWrite (pinLED4, HIGH);
  digitalWrite (pinLED5, HIGH);
  digitalWrite (pinLED6, LOW);
  digitalWrite (pinLED7, HIGH);
}

void fLEDSix(){
  //Number 6 (1,2,3,5,6,7)
  digitalWrite (pinLED1, HIGH);
  digitalWrite (pinLED2, HIGH);
  digitalWrite (pinLED3, HIGH);
  digitalWrite (pinLED4, LOW);
  digitalWrite (pinLED5, HIGH);
  digitalWrite (pinLED6, HIGH);
  digitalWrite (pinLED7, HIGH);
}

void fLEDTest(){
  //Clear
  digitalWrite (pinLED1, LOW);
  digitalWrite (pinLED2, LOW);
  digitalWrite (pinLED3, LOW);
  digitalWrite (pinLED4, LOW);
  digitalWrite (pinLED5, LOW);
  digitalWrite (pinLED6, LOW);
  digitalWrite (pinLED7, LOW);
  delay(200);

  digitalWrite (pinLED1, HIGH);
  delay(200);
  digitalWrite (pinLED2, HIGH);
  delay(200);
  digitalWrite (pinLED3, HIGH);
  delay(200);
  digitalWrite (pinLED4, HIGH);
  delay(200);
  digitalWrite (pinLED5, HIGH);
  delay(200);
  digitalWrite (pinLED6, HIGH);
  delay(200);
  digitalWrite (pinLED7, HIGH);
  delay(1500);
  digitalWrite (pinLED1, LOW);
  digitalWrite (pinLED2, LOW);
  digitalWrite (pinLED3, LOW);
  digitalWrite (pinLED4, LOW);
  digitalWrite (pinLED5, LOW);
  digitalWrite (pinLED6, LOW);
  digitalWrite (pinLED7, LOW);
  delay(200);
}